Physical Science: Electricity and Magnetism, Book N

Section 2: Electric Current

Self-Check Quiz-Eng.

1
Electrical current is measured in __________.
A)volts
B)ohms
C)amperes
D)watts
2
Voltage measures __________.
A)the current
B)the resistance
C)the power from a circuit
D)the energy electrons have
3
What flows in an electric circuit?
A)protons
B)neutrons
C)electrons
D)ions
4
Why do batteries run down?
A)there are too many electrons
B)the electrons in the chemicals are used up
C)there are too many protons
D)the protons are all gone
5
Why do wires with a current running through them get hot?
A)because resistance causes heat
B)because voltage causes heat
C)because current causes heat
D)because electrons cause heat
6
A long, thin wire has __________ than a short, thick wire.
A)lesser resistance
B)greater resistance
C)greater voltage
D)lesser voltage
7
As voltage increases, what happens to current?
A)It decreases.
B)It increases.
C)It stays the same.
D)It fluctuates randomly.
8
As resistance increases, what happens to current?
A)It increases.
B)It decreases.
C)It stays the same.
D)It fluctuates randomly.
9
What do you feel when you receive an electric shock?
A)voltage
B)resistance
C)current
D)power
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