Transferring Electrical Energy Quiz
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5 questions, one answer each
Each answer is checked as you go, with why.
See all 5 questions
1. Which equation correctly calculates electrical power?
- A. P = E × t
- B. P = I × V
- C. P = V ÷ I
- D. P = Q × t
2. What unit is used to measure household electrical energy usage for billing?
- A. Joules
- B. Watts
- C. Kilowatt-hours
- D. Newtons
3. An appliance transfers 3000 J of energy in 60 seconds. What is its power?
- A. 50 W
- B. 180 W
- C. 3060 W
- D. 0.02 W
4. A 1.5 kW heater runs for 4 hours. How much energy does it use, in kWh?
- A. 4 kWh
- B. 1.5 kWh
- C. 6 kWh
- D. 0.375 kWh
5. An electric oven operates at 230 V and draws a current of 10 A. To choose a fuse, which of the following fuse ratings would be most appropriate, assuming standard ratings of 3 A, 5 A, and 13 A?
- A. 3 A, because it is the smallest available
- B. 5 A, since it is close to but below the current
- C. 13 A, since the fuse rating must be just above the normal operating current
- D. No fuse is needed since the oven has high current