Correct Answer - Option 3 : 0.42 unit
CONCEPT:
-
Energy: The capacity to do work is called energy.
- Its S.I unit is Joule (J).
-
Power (P): The rate of work done is called power.
Energy (E) = Power (P) × Time (t)
CALCULATION:
Energy = Power × Time
Time (t) = 7 hour
P = 60 watt = 60/1000 = 0.06 kWh
Energy = 0.06 × 7 = 0.42 unit
- Hence 0.42 unit will be the energy consumed.