SSE JE Electrical Engineering 10 Dec 2020 Papers

Question : 163 of 200

Marks: +1, -0

An element consumes ‘W’ energy in joules for a time period ‘t’ seconds. What is the power of the electrical energy given to the element?

Solution:

Power (P): The rate of work done is called power. The SI unit of power is the watt (W).

\text "Power (P)" = \text "work done (W)" / \text "time taken (t) "

\P = \W / \t (\J \/ \s)

Also, Joule per second equal to Watt

∴ \P = \W / \t \Watt

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