An electric heater rated 1000 W operates for 2 hours daily. What is the electrical energy consumed in kilowatt-hours (kWh) in a month of 30 days?
Answer and explanation
Correct answer: B.
- Step 1: Power .
- Step 2: Daily energy consumption .
- Step 3: Monthly consumption in 30 days .
Answer
.
Why not the others: uses 1 hour per day; doubles daily hours; and leaves energy in watt-hours.
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