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Power

Question 3 A ...

Question

Question 3
A lamp consumes 1000 J of electrical energy in 10 s. What is its power?

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Solution

$P o w e r = \frac{W o r k}{T i m e}$
Work done = Energy consumed by the lamp $= 1000 J$
Time $= 10 s$
$P o w e r = \frac{1000}{10} = 100 J s^{- 1} = 100 W$

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