
Electric Current & Power
Authored by Gwyn Bixler
Science
8th - 9th Grade
Used 1+ times

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50 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
If an electric water heater uses 40 kW of power and runs for 8 hours, what is the total amount of energy used?
5 kilowatt-hours
48 kilowatt-hours
32 kilowatt-hours
320 kilowatt-hours
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
According to Ohm’s law, resistance is equal to voltage divided by
time.
current.
conduction.
potential.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
According to Ohm’s law, what is the resistance of a light if the voltage is 9.0 volts and the current is 0.30 amps?
0.033 ohms
30 ohms
2.7 ohms
8.7 ohms
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In a series circuit with three bulbs,
there are many paths for the current to take.
all of the bulbs become dimmer as more bulbs are added.
the remaining two bulbs are not affected if one bulb burns out.
a switch is never used.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In a series circuit with three bulbs, adding another bulb will
make the nearest bulb brighter.
make all the bulbs brighter.
make some of the bulbs dimmer.
make all the bulbs dimmer.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In a parallel circuit with three bulbs,
the bulbs must all be located on the same branch.
current from each bulb has its own path.
there is only one path for the current to take.
the overall resistance increases if a new branch is added.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A device to measure electrical potential energy difference, or voltage, is called a(n)
ammeter.
series meter.
voltmeter.
Ohm meter.
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