Practice Electric Power (8.11.1) - Current Electricity

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10 questions

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6 sample questions

Question 1.
What is the unit of electric power?
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Think about what we measure electrical consumption in.
Question 2.
If a device uses 100 W of power for 2 hours, how much energy does it consume?
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Use the formula E = Pt.
3Question 3.
What is electric power measured in?
- Watts
- Joules
- Volts
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Remember the term that represents the rate of energy usage.
4Question 4.
True or False: The formula for electric power can be expressed as P = IV.
- True
- False
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Think about how voltage and current relate to power.
Question 5.
A power plant generates 1 megawatt (MW) of electricity. If it runs for 10 hours, how much energy does it produce in kilowatt-hours?
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Convert megawatt to kilowatts and multiply by the time.
Question 6.
You have a power strip with five outlets, each rated at 1200 W. If you plug in four devices, how much maximum power can be consumed without exceeding the rating?
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Multiply the number of devices by the wattage of each.

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