Electromagnetism Answers

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5

Which devices use electromagnets? Check all that apply.

A
commutators
B
cranes
C
solenoids
D
generators
E
audio speakers
F
motors
6

What is responsible for making an axle spin in an electric motor?

A
an outside power source attached to a magnet
B
an outside power source attached directly to the axle
C
an electric current passing through an armature that lies in a magnetic field
D
a magnetic field inducing a current in an armature that lies in a magnetic field
9

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10

Direct current is produced by

A
an electric motor.
B
an armature.
C
a solenoid.
D
a battery.
11

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