Multiple choice

A body spends 20 joules of energy in 5 second . What is its power?

  1. 100 w

  2. 20 w

  3. 5 w

  4. 4 w
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Power is defined as the rate of energy transfer or work done per unit time. The formula is P = E/t. Here, Energy = 20 joules, Time = 5 seconds. Therefore, Power = 20/5 = 4 watts. Option D is correct.

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