Electrical Energy and Electrical Power Quiz
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5 questions, one answer each
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1. What does an electric circuit do with energy?
- A. It destroys energy
- B. It transfers energy from a source to the components and then into the surroundings
- C. It stores all energy permanently in the wires
- D. It creates new energy
2. Which equation gives electrical power?
- A. P = I / V
- B. P = I x V
- C. P = V / I
- D. P = I x t
3. A lamp operates at 12 V with a current of 0.5 A. What is its power?
- A. 24 W
- B. 6 W
- C. 12.5 W
- D. 0.04 W
4. What is one kilowatt-hour?
- A. The energy used by a 1 W appliance running for 1 hour
- B. The energy used by a 1 kW appliance running for 1 second
- C. The energy used by a 1 kW appliance running for 1 hour
- D. The power used by any appliance in one hour
5. A 3 kW appliance runs for 2 hours. If electricity costs 25 cents per kWh, what is the cost?
- A. 0.75
- B. 1.50
- C. 6.00
- D. 1.25