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Electricity Review 3
Test Description: Glencoe Physicial Science with Earth Science Ch 13 section 3 review.
Instructions: Answer all questions to get your test result.
1) In the formula for electrical energy what unit should be used for the value of time
A
It doesn't matter
B
Minutes
C
Seconds
D
Hours
2) What unit is typically used to measure electrical energy?
A
watt-hour
B
kilowatt-hour
C
kilowatt-minute
D
watt-minute
3) The formula for calculating electrical power is?
A
resistance x voltage
B
current x voltage difference
C
electrical energy / time
D
electrical energy x time
4) The formula for calculating electrical energy is?
A
power / time
B
current / time
C
resistance x time
D
power x time
5) Pick the best answer for what is used to prevent the overheating of electrical wires.
A
fuses or circuit breakers
B
series circuits
C
fuses
D
air conditioning
6) In this type of circuit, if one object turns off the other onjects may still stay on
A
series
B
parallel
C
breaker
D
convoluted
7) In a series circuit what happens to the bulb's brightness when extra bulbs are added?
A
gets dimmer
B
stays the same
C
the lights turn off
D
gets brighter
8) In a parallel circuit what happens to the bulb's brightness when more bulbs are added
A
the lights turn off
B
gets dimmer
C
gets brighter
D
stays the same
9) A circuit typically contains
A
a voltage source, conductors, and an object that uses electrical energy
B
a voltage source, insulators, and an object that makes electrical energy
C
a voltage source, an electrical energy producer, and lightbulbs
D
insulators, conductors, and tape
10) How much power does a hair dryer use if it has a current of 10 A and is plugged into a 240 V outlet?
A
.024 kW or 24 kW
B
24 W or .024 kW
C
2400 W or 2.4 kW
D
2.4 W or 2400 kW
*select an answer for all questions
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