Question

Find the energy in KWh consumed in 10 hours by four devices of power 500W each.

Answer 1

- Hint – Use the power consumed by each device information to calculate the total power consumed by the 4 devices. Then use the concept that energy will be the total power consumed by the devices in the given duration of time of 10 hours.

Complete step-by-step solution -

Given data:
Power of each device = 500 W.
Now there are 4 such devices so the total power of 4 devices is the power of 1 device multiplied by 4.
So total power = W.
Now as we know that 1000 W = 1 KW.
So 2000 W = 2 KW.
So the total power of 4 devices = 2 KW.
Now the KWh consumed by the devices is the multiplication of total power and time given in hours.
So energy consumed by 4 devices in KWh in 10 hours = KWh.
So this is the required answer.

Note – Kwh that is Kilowatt-hour is a unit of energy equal to 3600 kilojoules or 3.6 megajoules. The kilowatt-hour is commonly used as a billing unit for energy delivered to consumers by electric utilities. The definition of energy is the capacity or power to do work. Energy can exist in a variety of forms such as electrical, mechanical, chemical, thermal etc. The highly popular equation depicts that energy can be transferred from one form to another.