Question

For lighting a staircase, a bulb of 100w is used for 5 hours a day.
Calculate the units of electrical energy consumed for 30 days.​

Answer 1

Answer:

Explanation:

he power of the electric bulb is 40 W which is equal to 0.04 kW. The energy consumed per day is given as total running time multiplied by the power.

Therefore, the energy consumed per day is , EnergyconsumedQ=timetakent×powerconsumed=0.04kW×12.5hr=0.5kWh.

For 30 days, the energy consumed is given as 0.5kWh×30=15kWh.

Hence, the total energy consumed for 30 days is 15 kWh.