Rajasthan Police Constable Model Paper 4

Question : 87 of 150

Marks: +1, -0

Watt second is the unit of:

Solution:

The unit of power is the watt, and hence the unit of energy is watt-second since energy is the product of power and time.
The watt-second is referred to as joules.
One watt-second is equal to 1/3,600 of a watt-hour or one joule.
The dimensions of energy are $[ML^2T^{–2}]$ which is the same as work.
The SI unit joule (J) is named after the famous British physicist James Prescott Joule (1811-1869).

Hence, from the above points, we can clearly infer that Watt second is the unit of energy.

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