Single correct option
An electric heater of rating 2 kW is used for 3 hours daily. The electrical energy consumed in the 3 hours is
- A. 1.5 kWh
- B. 5 kWh
- C. 60 kWh
- D. 6 kWh
Show answer and solution
Answer: (D) 6 kWh
Energy = power x time = 2 kW x 3 h = 6 kWh, which is 6 commercial units of electricity (1 kWh = 3.6 x 10^6 J). The value 1.5 results from dividing instead of multiplying, and 5 comes from adding the numbers.
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