A bulb of 100 W glows for 6 hours a day. The units of energy consumed in 7 days would be:
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → 4.2 units
To calculate the energy consumed,
Energy Consumed = Power (kW) × Time (h)
Given,
Power of bulb = 100 W = 0.1 kW
Time per day = 6 hours
Number of day = 7 days
∴ Energy consumed = 0.1 kW × 42 hours
= 4.2 kWh