GENERAL KNOWLEDGE

Detailed explanation-1: -A watt-second (symbol W s or W⋅s) is a derived unit of energy equivalent to the joule. The watt-second is the energy equivalent to the power of one watt sustained for one second.

Detailed explanation-2: -Named in honour of the English physicist James Prescott Joule, it equals 107 ergs, or approximately 0.7377 foot-pounds. In electrical terms, the joule equals one watt-second-i.e., the energy released in one second by a current of one ampere through a resistance of one ohm.

Detailed explanation-3: -1 Joule [J] = 1 Watt-second [Ws] = 1 V A s = 1 N m = 1 kg m2s−2.