Unit 3 Review Quizzes:
CHAPTER 7 QUIZ
1. Static electricity refers to charges that
A. travel through a conductor
B. exist on a neutral object
C. can be collected and held in one place
D. power your computer
2. Which of the following correctly identifies the charges on the particles of an atom?
Proton Electron Neutron
A. positive neutral negative
B. negative positive neutral
C. neutral negative positive
D. positive negative neutral
3. Which of the following statements describes a solid neutral object becoming positively
charged?
A. Protons have been removed from this object.
B. Electrons have been removed from this object.
C. Protons have been added to this object.
D. Electrons have been added to this object.
4. A object that contains 5 million electrons can still be neutral because
A. electrons have no charge
B. the electrons are spread out evenly in the object
C. it also contains 5 million protons
D. the object is an insulator
5. Static charge can apply a force without touching the other object. This type of force is
called
A. action-at-a-distance force
B. long distance force
C. contact force
D. imaginary force
6. Which of the following is true of charged objects?
A. Like charges attract and opposite charges repel.
B. Like charges repel and neutral objects are repelled by charged objects.
C. Like charges repel and opposite charges attract.
D. Like charges attract and neutral objects are attracted to charged objects.
7. Which of the following would increase the force between two charged objects?
A. increasing the distance between the objects
B. increasing the charge on the objects
C. decreasing the charge on the objects
D. none of the above
8. Which of the following best describes a neutral solid object that is charged by conduction?
A. The electrons in the neutral solid object relocate when a charged object is
brought near.
B. The protons in the neutral solid object relocate when a charged object is
brought near.
C. The electrons in the neutral object transfer onto a positively charged object.
D. The protons in the neutral object transfer onto a negatively charged object.
9. Which of the following best describes a neutral solid object that is charged by induction?
A. The electrons in the neutral solid object relocate when a charged object is
brought near.
B. The protons in the neutral solid object relocate when a charged object is
brought near.
C. The electrons in the neutral object transfer onto a positively charged object.
D. The protons in the neutral object transfer onto a negatively charged object.
10. An electroscope that is charged positive would have its metal leaves separated. A negatively
charged rod is brought close to, but not touching the knob of the positive electroscope.
The metal leaves would
A. move farther apart
B. move closer together
C. not move
D. become negatively charged
Match the Term on the left with the best Descriptor on the right.
Each Descriptor may be used only once.
Term Descriptor
_____ 11. electroscope
_____ 12. Van de Graaff generator
_____ 13. acetate
_____ 14. conductor
_____ 15. grounding
_____ 16. coulomb
A. materials that allow electrons to travel freely
B. the unit of electric charge
C. device used to produce large amounts of static charge
D. allowing charge to flow into Earth’s surface
E. materials that do not allow electrons to travel freely
F. device used to detect static charge
G. acquires a negative charge by friction
Short Answer Questions
17. Two charged objects are positioned 5 cm away from each other. Describe the change in the
force between these two objects when
(a) the charge on one of the objects is increased
(b) the distance between the objects is increased to 10 cm
(c) the charge on both of the objects is decreased
Use the following diagram of a neutral
solid object to answer question 18.
18. Use (-) to represent electrons and (+) to represent protons to complete the diagrams.
(a) A positive rod is positioned near the original object.
(b) A positive rod is touched to the original object.
19. The Styrofoam™ chips used for packing often have a static charge and “cling” to you.
Describe how you could use an acetate strip to determine whether the Styrofoam™ chips
are positively or negatively charged.
_____________________________________________________________________________
_____________________________________________________________________________
CHAPTER 7 QUIZ
1. Static electricity refers to charges that
A. travel through a conductor
B. exist on a neutral object
C. can be collected and held in one place
D. power your computer
2. Which of the following correctly identifies the charges on the particles of an atom?
Proton Electron Neutron
A. positive neutral negative
B. negative positive neutral
C. neutral negative positive
D. positive negative neutral
3. Which of the following statements describes a solid neutral object becoming positively
charged?
A. Protons have been removed from this object.
B. Electrons have been removed from this object.
C. Protons have been added to this object.
D. Electrons have been added to this object.
4. A object that contains 5 million electrons can still be neutral because
A. electrons have no charge
B. the electrons are spread out evenly in the object
C. it also contains 5 million protons
D. the object is an insulator
5. Static charge can apply a force without touching the other object. This type of force is
called
A. action-at-a-distance force
B. long distance force
C. contact force
D. imaginary force
6. Which of the following is true of charged objects?
A. Like charges attract and opposite charges repel.
B. Like charges repel and neutral objects are repelled by charged objects.
C. Like charges repel and opposite charges attract.
D. Like charges attract and neutral objects are attracted to charged objects.
7. Which of the following would increase the force between two charged objects?
A. increasing the distance between the objects
B. increasing the charge on the objects
C. decreasing the charge on the objects
D. none of the above
8. Which of the following best describes a neutral solid object that is charged by conduction?
A. The electrons in the neutral solid object relocate when a charged object is
brought near.
B. The protons in the neutral solid object relocate when a charged object is
brought near.
C. The electrons in the neutral object transfer onto a positively charged object.
D. The protons in the neutral object transfer onto a negatively charged object.
9. Which of the following best describes a neutral solid object that is charged by induction?
A. The electrons in the neutral solid object relocate when a charged object is
brought near.
B. The protons in the neutral solid object relocate when a charged object is
brought near.
C. The electrons in the neutral object transfer onto a positively charged object.
D. The protons in the neutral object transfer onto a negatively charged object.
10. An electroscope that is charged positive would have its metal leaves separated. A negatively
charged rod is brought close to, but not touching the knob of the positive electroscope.
The metal leaves would
A. move farther apart
B. move closer together
C. not move
D. become negatively charged
Match the Term on the left with the best Descriptor on the right.
Each Descriptor may be used only once.
Term Descriptor
_____ 11. electroscope
_____ 12. Van de Graaff generator
_____ 13. acetate
_____ 14. conductor
_____ 15. grounding
_____ 16. coulomb
A. materials that allow electrons to travel freely
B. the unit of electric charge
C. device used to produce large amounts of static charge
D. allowing charge to flow into Earth’s surface
E. materials that do not allow electrons to travel freely
F. device used to detect static charge
G. acquires a negative charge by friction
Short Answer Questions
17. Two charged objects are positioned 5 cm away from each other. Describe the change in the
force between these two objects when
(a) the charge on one of the objects is increased
(b) the distance between the objects is increased to 10 cm
(c) the charge on both of the objects is decreased
Use the following diagram of a neutral
solid object to answer question 18.
18. Use (-) to represent electrons and (+) to represent protons to complete the diagrams.
(a) A positive rod is positioned near the original object.
(b) A positive rod is touched to the original object.
19. The Styrofoam™ chips used for packing often have a static charge and “cling” to you.
Describe how you could use an acetate strip to determine whether the Styrofoam™ chips
are positively or negatively charged.
_____________________________________________________________________________
_____________________________________________________________________________
CHAPTER 8 QUIZ
1. The amount of electric energy stored in charge depends on which two factors?
A. current, amount of voltage
B. current, amount of resistance
C. voltage, amount of charge
D. voltage, amount of resistance
2. Which combination of materials could be used to produce the best electrochemical cell?
A. two silver electrodes and an acidic solution
B. an aluminum electrode, a copper electrode, and an acidic solution
C. two silver electrodes and water
D. an aluminum electrode, a copper electrode, and water
3. Which of the following is not a common energy source used to produce electrical energy?
A. friction
B. thermocouples
C. piezoelectric crystals
D. elastic
4. Which of the following is not an electric load?
A. battery
B. light bulb
C. resistor
D. buzzer
5. Which statement correctly defines the difference between static electricity and current electricity?
A. Static electricity is the flow of positive charge, whereas current electricity is the flow of negative charge.
B. Static electricity is the flow of charge in a circuit, whereas in current electricity the charge stays in one place.
C. Static electricity is the flow of negative charge, whereas current electricity is the flow of positive charge.
D. In static electricity, the charge stays in one place, whereas current electricity is the flow of charge in a circuit.
6. Conventional current is defined as
A. the flow of charge from positive to negative
B. the flow of charge from negative to positive
C. the flow of electrons
D. the current caused by sources other than batteries
7. An electric device that slows down current and changes electrical energy into other forms is
called a
A. battery
B. conductor
C. resistor
D. switch
Use the resistor colour coding chart to answer-question 8.
Colour black brown red orange yellow green blue violet grey white
Numeric
value
0 1 2 3 4 5 6 7 8 9
8. Calculate the resistance of a resistor with the following three bands of colours: blue,
yellow, red.
A. 4600 ð
B. 64 200 ð
C. 6400 ð
D. 642 ð
9. What is the purpose of an ohmmeter?
A. to measure current
B. to measure voltage
C. to measure resistance
D. to measure charge
10. A current of 2.0 A flows through a 12 ð resistor. What is the voltage across this resistor?
A. 2. 0 V
B. 6.0 V
C. 12 V
D. 24 V
Match the Term on the left with the best Descriptor on the right. Each Descriptor may be used only once.
Term Descriptor
_____ 11. voltmeter
_____ 12. ammeter
_____ 13. current
_____ 14. voltage
_____ 15. resistance
_____ 16. circuit
A. amount of charge passing a given point per second
B. device used to measure current.
C. a complete path for current to travel
D. device used to measure potential difference
E. slows down the movement of charge
F. the flow of positive charge
G. amount of electric potential energy per unit of charge.
Short Answer Questions
18. Calculate the following using Ohm’s law.
(a) A light bulb is connected to a 9.0 V battery. The current through the light bulb is
measured to be 300 mA. What is the resistance of the light bulb?
__________________________________________________________________________
(b) A 16 V source is connected to a 2.5 kð load. What is the current through this load?
Give your answer in both amperes (A) and milliamperes (mA).
__________________________________________________________________________
19. You are given a load of an unknown resistance. Describe how you would determine this
load’s resistance using a battery, voltmeter, ammeter, and connecting wires.
_____________________________________________________________________________
_____________________________________________________________________________
1. The amount of electric energy stored in charge depends on which two factors?
A. current, amount of voltage
B. current, amount of resistance
C. voltage, amount of charge
D. voltage, amount of resistance
2. Which combination of materials could be used to produce the best electrochemical cell?
A. two silver electrodes and an acidic solution
B. an aluminum electrode, a copper electrode, and an acidic solution
C. two silver electrodes and water
D. an aluminum electrode, a copper electrode, and water
3. Which of the following is not a common energy source used to produce electrical energy?
A. friction
B. thermocouples
C. piezoelectric crystals
D. elastic
4. Which of the following is not an electric load?
A. battery
B. light bulb
C. resistor
D. buzzer
5. Which statement correctly defines the difference between static electricity and current electricity?
A. Static electricity is the flow of positive charge, whereas current electricity is the flow of negative charge.
B. Static electricity is the flow of charge in a circuit, whereas in current electricity the charge stays in one place.
C. Static electricity is the flow of negative charge, whereas current electricity is the flow of positive charge.
D. In static electricity, the charge stays in one place, whereas current electricity is the flow of charge in a circuit.
6. Conventional current is defined as
A. the flow of charge from positive to negative
B. the flow of charge from negative to positive
C. the flow of electrons
D. the current caused by sources other than batteries
7. An electric device that slows down current and changes electrical energy into other forms is
called a
A. battery
B. conductor
C. resistor
D. switch
Use the resistor colour coding chart to answer-question 8.
Colour black brown red orange yellow green blue violet grey white
Numeric
value
0 1 2 3 4 5 6 7 8 9
8. Calculate the resistance of a resistor with the following three bands of colours: blue,
yellow, red.
A. 4600 ð
B. 64 200 ð
C. 6400 ð
D. 642 ð
9. What is the purpose of an ohmmeter?
A. to measure current
B. to measure voltage
C. to measure resistance
D. to measure charge
10. A current of 2.0 A flows through a 12 ð resistor. What is the voltage across this resistor?
A. 2. 0 V
B. 6.0 V
C. 12 V
D. 24 V
Match the Term on the left with the best Descriptor on the right. Each Descriptor may be used only once.
Term Descriptor
_____ 11. voltmeter
_____ 12. ammeter
_____ 13. current
_____ 14. voltage
_____ 15. resistance
_____ 16. circuit
A. amount of charge passing a given point per second
B. device used to measure current.
C. a complete path for current to travel
D. device used to measure potential difference
E. slows down the movement of charge
F. the flow of positive charge
G. amount of electric potential energy per unit of charge.
Short Answer Questions
18. Calculate the following using Ohm’s law.
(a) A light bulb is connected to a 9.0 V battery. The current through the light bulb is
measured to be 300 mA. What is the resistance of the light bulb?
__________________________________________________________________________
(b) A 16 V source is connected to a 2.5 kð load. What is the current through this load?
Give your answer in both amperes (A) and milliamperes (mA).
__________________________________________________________________________
19. You are given a load of an unknown resistance. Describe how you would determine this
load’s resistance using a battery, voltmeter, ammeter, and connecting wires.
_____________________________________________________________________________
_____________________________________________________________________________
CHAPTER 9 QUIZ
1. Two identical resistors are connected in series to a battery. How does the current through
the second resistor compare to the current through the first resistor?
A. half the current
B. twice the current
C. the same current
D. no current
2. Two identical resistors are connected in parallel to a battery. How does the voltage across
the second resistor compare to the voltage across the first resistor?
A. half the voltage
B. twice the voltage
C. the same voltage
D. half the voltage of the battery
3. A load is connected to a battery. If a second identical load is added in series to the first,
what happens to the total resistance of the circuit and the current leaving the battery?
A. Total resistance increases and the current increases.
B. Total resistance increases and the current decreases.
C. Total resistance decreases and the current increases.
D. Total resistance decreases and the current decreases.
4. A load is connected to a battery. If a second identical load is added in parallel to the first,
what happens to the total resistance of the circuit and the current leaving the battery?
A. Total resistance increases and the current increases.
B. Total resistance increases and the current decreases.
C. Total resistance decreases and the current increases.
D. Total resistance decreases and the current decreases.
5. Which of the following units would be used if measuring a large amount of energy?
A. joule
B. watt
C. coulomb
D. kilowatt-hour
6. Which one of the following best represents a series pathway?
A. walking from home to school
B. running a lap on an oval running track
C. going through the checkouts at a large grocery store
D. driving across Canada
7. In the circuit shown below, what would be the readings on the voltmeter V, and
ammeter A?
Voltmeter, V Ammeter, A
A. 3.0 V 1.0 A
B. 4.0 V 3.0 A
C. 8.0 V 3.0 A
D. 12 V 9.0 A
8. In the circuit shown below, what would be the readings on the voltmeter V, and
ammeter A?
Voltmeter, V Ammeter, A
A. 9.0 V 2.0 A
B. 9.0 V 5.0 A
C. 12 V 5.0 A
D. 12 V 12 A
9. What is the current through a 180 W light bulb, if it is connected to 120 V?
A. 0.67 A
B. 1.5 A
C. 120 A
D. 21 600 A
10. What is the energy consumption of an 1800 W microwave oven used for 30 min?
A. 0.90 kW•h
B. 54 kW•h
C. 900 kW•h
D. 54 000 kW•h
Match the Term on the left with the best Descriptor on the right.
Each Descriptor may be used only once.
Term Descriptor
_____ 11. junction point
_____ 12. series circuit
_____ 13. parallel circuit
_____ 14. joule
_____ 15. watt
_____ 16. power
A. more than one path
B. a unit of energy measurement
C. rate of flow of current
D. a unit of power measurement
E. one path for current to travel
F. rate at which energy is transformed
G. location where pathways combine
Short Answer Questions
17. A battery is connected to two light bulbs connected in parallel. If the first light bulb “burns
out,” what happens to the second light bulb? Explain. ______________________________________
_____________________________________________________________________________________________
18. A 1400 W hair dryer is used for 15 min.
(a) Calculate the electrical energy consumed in the following units:
(i) joules_______________________________________________________________________________
(ii) kilowatt-hours______________________________________________________________________
(b) If the cost of electricity is 8¢ per kW•h, calculate how much it costs to use this
hair dryer.______________________________________________________________________________
19. Use the diagram above to find
(a) the current through Lamp 1 ____________________________________________________________
(b) the voltage across Lamp 1 ______________________________________________________________
(c) the power lost in Lamp 1 _______________________________________________________________
1. Two identical resistors are connected in series to a battery. How does the current through
the second resistor compare to the current through the first resistor?
A. half the current
B. twice the current
C. the same current
D. no current
2. Two identical resistors are connected in parallel to a battery. How does the voltage across
the second resistor compare to the voltage across the first resistor?
A. half the voltage
B. twice the voltage
C. the same voltage
D. half the voltage of the battery
3. A load is connected to a battery. If a second identical load is added in series to the first,
what happens to the total resistance of the circuit and the current leaving the battery?
A. Total resistance increases and the current increases.
B. Total resistance increases and the current decreases.
C. Total resistance decreases and the current increases.
D. Total resistance decreases and the current decreases.
4. A load is connected to a battery. If a second identical load is added in parallel to the first,
what happens to the total resistance of the circuit and the current leaving the battery?
A. Total resistance increases and the current increases.
B. Total resistance increases and the current decreases.
C. Total resistance decreases and the current increases.
D. Total resistance decreases and the current decreases.
5. Which of the following units would be used if measuring a large amount of energy?
A. joule
B. watt
C. coulomb
D. kilowatt-hour
6. Which one of the following best represents a series pathway?
A. walking from home to school
B. running a lap on an oval running track
C. going through the checkouts at a large grocery store
D. driving across Canada
7. In the circuit shown below, what would be the readings on the voltmeter V, and
ammeter A?
Voltmeter, V Ammeter, A
A. 3.0 V 1.0 A
B. 4.0 V 3.0 A
C. 8.0 V 3.0 A
D. 12 V 9.0 A
8. In the circuit shown below, what would be the readings on the voltmeter V, and
ammeter A?
Voltmeter, V Ammeter, A
A. 9.0 V 2.0 A
B. 9.0 V 5.0 A
C. 12 V 5.0 A
D. 12 V 12 A
9. What is the current through a 180 W light bulb, if it is connected to 120 V?
A. 0.67 A
B. 1.5 A
C. 120 A
D. 21 600 A
10. What is the energy consumption of an 1800 W microwave oven used for 30 min?
A. 0.90 kW•h
B. 54 kW•h
C. 900 kW•h
D. 54 000 kW•h
Match the Term on the left with the best Descriptor on the right.
Each Descriptor may be used only once.
Term Descriptor
_____ 11. junction point
_____ 12. series circuit
_____ 13. parallel circuit
_____ 14. joule
_____ 15. watt
_____ 16. power
A. more than one path
B. a unit of energy measurement
C. rate of flow of current
D. a unit of power measurement
E. one path for current to travel
F. rate at which energy is transformed
G. location where pathways combine
Short Answer Questions
17. A battery is connected to two light bulbs connected in parallel. If the first light bulb “burns
out,” what happens to the second light bulb? Explain. ______________________________________
_____________________________________________________________________________________________
18. A 1400 W hair dryer is used for 15 min.
(a) Calculate the electrical energy consumed in the following units:
(i) joules_______________________________________________________________________________
(ii) kilowatt-hours______________________________________________________________________
(b) If the cost of electricity is 8¢ per kW•h, calculate how much it costs to use this
hair dryer.______________________________________________________________________________
19. Use the diagram above to find
(a) the current through Lamp 1 ____________________________________________________________
(b) the voltage across Lamp 1 ______________________________________________________________
(c) the power lost in Lamp 1 _______________________________________________________________
UNIT 3 TEST
1. The charge on the electron and proton are
Proton Electron
A. negative negative
B. negative positive
C. positive negative
D. positive positive
2. A neutral solid object is rubbed with wool and becomes positively charged. Which
statement best describes the transfer of charge?
A. Protons are transferred from the wool onto the object.
B. Electrons are transferred from the object onto the wool.
C. Protons are created in the solid object.
D. Electrons in the solid object have been destroyed.
3. One of the laws of static charge states that
A. like charges attract
B. opposite charges repel
C. opposite charges attract
D. neutral objects are repelled by charged objects
4. Both AA and AAA batteries have a 1.5 V potential difference across their terminals. How is
it possible for them to have different amounts of electrical potential energy?
A. They have different amounts of resistance.
B. They are different sizes.
C. They have different voltages.
D. They can separate different amounts of charge.
5. The load in an electric circuit
A. is the source of electric energy
B. can turn the circuit on or off by closing or opening the circuit
C. is the wire through which electric current flows
D. transforms electrical energy into other forms of energy
6. Electrical resistance is determined by calculating
A. the potential difference across a load divided by the current flowing through it
B. the current flowing through a load divided by the potential difference across it
C. the current across a load divided by the potential difference flowing through it
D. the potential difference across a load multiplied by the current flowing through it
7. Which of the following correctly identifies the meter used to measure the following
quantities?
Measuring
voltage
Measuring
current
Measuring
resistance
A ammeter voltmeter ohmmeter
B ohmmeter ammeter voltmeter
C voltmeter ammeter ohmmeter
D voltmeter ohmmeter ammeter
8. Which of the following describes the current in a series circuit?
A. The current decreases as it moves through the circuit.
B. The current is the same at every point in the circuit.
C. The current is greatest through the load.
D. The current is the greatest at the negative terminal of the battery.
9. A circuit contains a battery and a resistor. Which of the following correctly describes the
total resistance when a second resistor is added to a circuit in either series or parallel?
Total resistance when the second resistor is added in series
Total resistance when the second resistor is added in parallel
A increases increases
B increases decreases
C decreases increases
D decreases decreases
10. Two light bulbs are connected in parallel to a source of constant voltage. If one of the
bulbs is unscrewed, the voltage across the other bulb will
A. double
B. halve
C. remain the same
D. become zero
Match the Term on the left with the best Descriptor on the right. Each Descriptor may be used only once.
Term Descriptor
_____ 11. coulomb
_____ 12. current
_____ 13. joules
_____ 14. Ohm’s law
_____ 15. power
_____ 16. resistance
_____ 17. series circuit
_____ 18. parallel circuit
_____ 19. static charge
_____ 20. voltage
A. only one path for current to travel
B. charge that remains in one location
C. unit of energy
D. the rate in which energy is transformed
E. amount of energy per unit of charge
F. ability to do work
G. more than one path for current
H. continuous flow of charge
I. relationship of voltage, current, and resistance
J. unit of charge
K. slows down current and changes electrical energy into other forms
Short Answer Questions
21. Place negative (Å|) signs and positive (+) signs in the blank rectangles to represent the following charges.
neutral
negative
positive
22. (a) Explain the difference between an insulator and a conductor.
(b) Give an example of an insulator ________________________________________________________
(c) Give an example of a conductor ________________________________________________________
23. In terms of charge transfer, what is the difference between charging by conduction and
charging by induction?
______________________________________________________________________________
______________________________________________________________________________
24. Two charged objects are located near one another. Use the words increases or decreases
to complete the following statements regarding the force between these two charges.
(a) Increasing the charge on one of the objects ____________ the force between the two charged objects.
(b) Increasing the distance between the two objects __________ the force between the two charged objects.
(c) Decreasing the distance between the two objects __________ the force between the two charged objects.
25. Explain why, when testing an unknown charge, the only sure way to identify the kind of
charge is to observe its repulsion with a known charge.
______________________________________________________________________________
______________________________________________________________________________
26. Using correct circuit symbols, draw a circuit diagram for the following circuit.
27. Use Ohm’s law to calculate the following.
(a) A circuit takes 0.60 A of current from a 12 V battery. What is the resistance of this circuit?
______________________________________________________________________________
(b) A 12 Mð resistor is connected to a 60 kV high power line. What is the current, in milliamperes (mA) through this resistor?
______________________________________________________________________________
(c) A resistor with brown, black, and red bands of colour has a current of 0.020 A flowing through it.
(i) What is the voltage across this resistor? ____________________
Colour black brown red orange yellow green blue violet grey white
Numeric
value
0 1 2 3 4 5 6 7 8 9
(ii) Use the colour code to find the value of this resistor. __________________
1. The charge on the electron and proton are
Proton Electron
A. negative negative
B. negative positive
C. positive negative
D. positive positive
2. A neutral solid object is rubbed with wool and becomes positively charged. Which
statement best describes the transfer of charge?
A. Protons are transferred from the wool onto the object.
B. Electrons are transferred from the object onto the wool.
C. Protons are created in the solid object.
D. Electrons in the solid object have been destroyed.
3. One of the laws of static charge states that
A. like charges attract
B. opposite charges repel
C. opposite charges attract
D. neutral objects are repelled by charged objects
4. Both AA and AAA batteries have a 1.5 V potential difference across their terminals. How is
it possible for them to have different amounts of electrical potential energy?
A. They have different amounts of resistance.
B. They are different sizes.
C. They have different voltages.
D. They can separate different amounts of charge.
5. The load in an electric circuit
A. is the source of electric energy
B. can turn the circuit on or off by closing or opening the circuit
C. is the wire through which electric current flows
D. transforms electrical energy into other forms of energy
6. Electrical resistance is determined by calculating
A. the potential difference across a load divided by the current flowing through it
B. the current flowing through a load divided by the potential difference across it
C. the current across a load divided by the potential difference flowing through it
D. the potential difference across a load multiplied by the current flowing through it
7. Which of the following correctly identifies the meter used to measure the following
quantities?
Measuring
voltage
Measuring
current
Measuring
resistance
A ammeter voltmeter ohmmeter
B ohmmeter ammeter voltmeter
C voltmeter ammeter ohmmeter
D voltmeter ohmmeter ammeter
8. Which of the following describes the current in a series circuit?
A. The current decreases as it moves through the circuit.
B. The current is the same at every point in the circuit.
C. The current is greatest through the load.
D. The current is the greatest at the negative terminal of the battery.
9. A circuit contains a battery and a resistor. Which of the following correctly describes the
total resistance when a second resistor is added to a circuit in either series or parallel?
Total resistance when the second resistor is added in series
Total resistance when the second resistor is added in parallel
A increases increases
B increases decreases
C decreases increases
D decreases decreases
10. Two light bulbs are connected in parallel to a source of constant voltage. If one of the
bulbs is unscrewed, the voltage across the other bulb will
A. double
B. halve
C. remain the same
D. become zero
Match the Term on the left with the best Descriptor on the right. Each Descriptor may be used only once.
Term Descriptor
_____ 11. coulomb
_____ 12. current
_____ 13. joules
_____ 14. Ohm’s law
_____ 15. power
_____ 16. resistance
_____ 17. series circuit
_____ 18. parallel circuit
_____ 19. static charge
_____ 20. voltage
A. only one path for current to travel
B. charge that remains in one location
C. unit of energy
D. the rate in which energy is transformed
E. amount of energy per unit of charge
F. ability to do work
G. more than one path for current
H. continuous flow of charge
I. relationship of voltage, current, and resistance
J. unit of charge
K. slows down current and changes electrical energy into other forms
Short Answer Questions
21. Place negative (Å|) signs and positive (+) signs in the blank rectangles to represent the following charges.
neutral
negative
positive
22. (a) Explain the difference between an insulator and a conductor.
(b) Give an example of an insulator ________________________________________________________
(c) Give an example of a conductor ________________________________________________________
23. In terms of charge transfer, what is the difference between charging by conduction and
charging by induction?
______________________________________________________________________________
______________________________________________________________________________
24. Two charged objects are located near one another. Use the words increases or decreases
to complete the following statements regarding the force between these two charges.
(a) Increasing the charge on one of the objects ____________ the force between the two charged objects.
(b) Increasing the distance between the two objects __________ the force between the two charged objects.
(c) Decreasing the distance between the two objects __________ the force between the two charged objects.
25. Explain why, when testing an unknown charge, the only sure way to identify the kind of
charge is to observe its repulsion with a known charge.
______________________________________________________________________________
______________________________________________________________________________
26. Using correct circuit symbols, draw a circuit diagram for the following circuit.
27. Use Ohm’s law to calculate the following.
(a) A circuit takes 0.60 A of current from a 12 V battery. What is the resistance of this circuit?
______________________________________________________________________________
(b) A 12 Mð resistor is connected to a 60 kV high power line. What is the current, in milliamperes (mA) through this resistor?
______________________________________________________________________________
(c) A resistor with brown, black, and red bands of colour has a current of 0.020 A flowing through it.
(i) What is the voltage across this resistor? ____________________
Colour black brown red orange yellow green blue violet grey white
Numeric
value
0 1 2 3 4 5 6 7 8 9
(ii) Use the colour code to find the value of this resistor. __________________