Introduction To Physical Science

Chapter 20: Electricity

Section 3 Self-Check Quiz-Eng.

1
What variable does Ohm's law NOT describe?
A)current
B)power
C)resistance
D)voltage
2
What kind of circuit has only one path for current flow?
A)parallel
B)voltage
C)series
D)conducting
3
What kind of circuit has more than one path for current flow?
A)series
B)voltage
C)conducting
D)parallel
4
When devices are added to a series circuit, what happens to the current?
A)It decreases.
B)It increases.
C)It stays the same.
D)It fluctuates randomly.
5
What is the equation to calculate electrical power?
A)P = I x V
B)I = V/W
C)P = I/V
D)I = V x W
6
How much energy is needed to run a 50-W lightbulb for 5 hours?
A)0.25 kWh
B)250 kWh
C)10 kWh
D)0.01 kWh
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