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Question

Define power. What is its SI unit?


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Solution

  1. Power is defined as the rate of doing work.
  2. It is expressed as power = work done/time taken
  3. The unit of power is joule/second. In symbol, it is represented as Js.
  4. The SI unit of power is watt and its symbol is W.
  5. 1 watt W = 1 joule/second Js

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