Question

Name the quantity which is measured in $Wh$.
a) Force
b) Power
c) Energy
d) All the above

Answer 1

Hint: In the given unit $Wh$, W represents Watt and h represents hour. Watt is the SI unit of Power and hour is a unit of time. As we know that, $Power=\dfrac{work}{time}$. So, we can say that $Work=Power\times time$
Therefore, $Wh$ is the unit of work done.
Now, in the given option, check whether any of them is equal to work done.

Complete step by step answer:
a) Force
As we know that, $work=Force\times displacement$. Clearly, forces do not have the same measuring unit.
Hence, option (a) is incorrect.

b) Power
Already mentioned that the unit of power is W. So, option (b) is also incorrect.

c) Energy
Since, work done is the energy applied, therefore $Work=Energy$. So, energy has $Wh$ as a measuring unit.
Hence option (c) is the correct choice.

So, the correct answer is “Option C”.

Note:
The SI unit of time is seconds, but we can have minutes or hours as a measuring unit too. Therefore, for this question, hour is used for time. Hence, we cannot say that $Wh$is the SI unit of work. It is just one of the measuring units of work. The SI unit of work is Joule (J) or $Ws$.