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Electricity and Magnetism — Test Answers

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21
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Ohm’s law describes the relationship between which quantities?

A
voltage, resistance, and ohms
B
resistance, current, and amperes
C
current, voltage, and resistance
D
amperes, ohms, and current
22
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Georgia moves an unattached piece of wire back and forth over a magnet. Which best explains what will happen?

A
A current will not be induced because the wire is not part of a closed circuit.
B
A current will be induced because the wire moves through a magnetic field.
C
A current will be induced because the wire is not part of a closed circuit.
D
A current will not be induced because the wire moves through a magnetic field.
24

Nina is working with electricity and shortens the wires through which the current is flowing. What is Nina most likely trying to accomplish?

A
increase resistance
B
convert electric energy to heat
C
convert electric energy to light
D
decrease resistance
25

Which label belongs in the area marked X?

A
Solenoid
B
Force on wire
C
Magnetic field
D
Current

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