Indiana Science Grade 8

Chapter 11: Magnetism

Standardized Test Practice

1.
What is the device shown in the illustration?

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A)electromagnet
B)electric motor
C)transformer
D)generator
2.
If the input voltage on the device is 60 V, what is the output voltage?

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A)15 V
B)30 V
C)25 V
D)120 V
3.
Earth's magnetic field is similar to the shape of which of the following?
A)disk magnet
B)bar magnet
C)horseshoe magnet
D)superconductor
4.
An alternating current can be produced by which of the following?
A)electromagnet
B)generator
C)motor
D)superconductor
5.
Which is true about a temporary magnet which is not magnetized?
A)Like poles of domains are aligned.
B)Unlike poles of domains are aligned.
C)Domains point in random directions
D)Domains have broken apart.
6.
Which energy transformation occurs in the device shown in the illustration?

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A)electric to kinetic
B)electric to potential
C)kinetic to electric
D)potential to electric
7.
Why are two current-carrying wires able to attract each other?
A)Their electric fields attract.
B)Their currents are in opposite directions.
C)Their currents are in the same direction.
D)They produce magnetic fields that attract.
8.
What deflects most of the charged particles that stream from the Sun toward Earth?
A)aurora
B)magnetosphere
C)declination
D)outer core
9.
What is the function of transformers located near your home?
A)increase voltage
B)change DC to AC
C)change AC to DC
D)decrease voltage
10.
How would an electromagnet change if it had no iron core?
A)decreased current
B)decreased magnetic field
C)increased current
D)increased magnetic field
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