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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
Minutes
B
Seconds
C
It doesn't matter
D
Hours
2) What unit is typically used to measure electrical energy?
A
kilowatt-hour
B
watt-minute
C
kilowatt-minute
D
watt-hour
3) The formula for calculating electrical power is?
A
current x voltage difference
B
resistance x voltage
C
electrical energy / time
D
electrical energy x time
4) The formula for calculating electrical energy is?
A
power / time
B
power x time
C
resistance x time
D
current / 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
air conditioning
D
fuses
6) In this type of circuit, if one object turns off the other onjects may still stay on
A
series
B
parallel
C
convoluted
D
breaker
7) In a series circuit what happens to the bulb's brightness when extra bulbs are added?
A
stays the same
B
gets brighter
C
gets dimmer
D
the lights turn off
8) In a parallel circuit what happens to the bulb's brightness when more bulbs are added
A
gets brighter
B
gets dimmer
C
the lights turn off
D
stays the same
9) A circuit typically contains
A
insulators, conductors, and tape
B
a voltage source, insulators, and an object that makes electrical energy
C
a voltage source, conductors, and an object that uses electrical energy
D
a voltage source, an electrical energy producer, and lightbulbs
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
2.4 W or 2400 kW
C
24 W or .024 kW
D
2400 W or 2.4 kW
*select an answer for all questions
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