Question

An electric fan marked 60 watt consumes 3 units for the duration:

• A. 50 hours
• B. 150 hours
• C. 10 hours
• D. 15 hours

Answer 1

The correct option is A 50 hours

Answer is A.
The total energy consumed is 3 units = 3 kWh = 3000 Wh.
The total enrgy dissipated is given as Power * Time.
Therefore, time = Energy dissipated / Power.
Time taken = 3000 Wh / 60 W = 50 hours.
Hence, an electric fan marked 60 watt consumes 3 units for the duration of 50 hours.