Question

How much units of energy is consumed in operating ten 50 watt bulbs for 10 hours per day in a month (30 days)

• A. 100 kwh
• B. 150 kwh
• C. 160 kwh
• D. 500 kwh

Answer 1

The correct option is B 150 kwh

Given : $P=0.05$ kW $t=10$ hours per day

Number of bulbs $n=10$

Energy consumed per day $E=nPt=10\times 0.05\times 10=5$ kwh per day

Total energy consumed in 30 days $E_t=5\times 30=150$ kWh