Question

Kwh is the unit to measure which quantity?
  (a) electric energy
  (b) voltage
  (c) electric force
  (d) power

Answer 1

- Hint – In this question think of the possible measurement quantity corresponding to the given options like voltage is measured in Volts, example 5V battery is connected to the circuit. Force is generally measured in Newton example, we must have come across statements like 10N force is applied at equal distance of 2 m to a beam a length l meters. Power is generally measured in watt, in this way figure out the right option from the given ones.

Complete step-by-step solution -

As we know that the unit of power is watt (W) or it is in kilo watt (KW).
Now when the power is multiplied by the time interval in which a specific device runs is known as electrical energy consumed by that device in that time interval.
Where the time interval is always measured in hours.
So power (P) in KW multiplied by time (t) in hr. = E (KWh)
So KWh is the unit of electric energy.
And 1 KWh = 1 unit of electric energy.
So this is the required answer.
Hence option (A) is correct.

Note – Energy is basically termed as the capacity for doing work of it can also be defined as the power to do a work, such as the capacity to move an object by application of force. Energy can exist in a variety of forms such as electrical, mechanical, chemical, thermal or nuclear and can be easily converted from one form to another.