Indiana Science Grade 8

Chapter 11: Magnetism

Section 2 Self-Check Quiz-Eng.

1.
Which of the following devices produces electric current?
A)compass
B)electric fan
C)generator
D)motor
2.
What effect does increasing the current flowing in the wire have on an electromagnet?
A)It decreases the strength of the magnetic field.
B)It increases the strength of the magnetic field.
C)It has no effect on the electromagnet.
D)It causes it to become a permanent magnet.
3.
__________ flows in only one direction through a wire.
A)Direct current
B)Alternating current
C)Voltage
D)Electric current
4.
Alternating current changes the __________ of the current flow.
A)strength
B)amount
C)voltage
D)direction
5.
Which of the following devices can increase or decrease the voltage of an alternating current?
A)generator
B)battery
C)motor
D)transformer
6.
The input coil of a step-up transformer has 10 turns and its output coil has 100 turns. What is the voltage in the output coil if the input voltage is 50 V?
A)5500 V
B)500 V
C)4500 V
D)160 V
7.
What is the most common type of power plant?
A)hydroelectric
B)coal burning
C)wind power
D)nuclear
8.
Electric current should pass through a __________ after being transmitted by a power plant and before it enters your home.
A)step-up transformer
B)step-down transformer
C)generator
D)turbine
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