How much time will be required to perform 520 J of work at the rate of 20 W?

24 s

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16 s

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20 s

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26 s

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Solution

The correct option is D 26 s
We know that,
$P o w e r \times t i m e = W o r k d o n e$
$\Rightarrow$ $t i m e = \frac{W o r k d o n e}{P o w e r} = \frac{520}{20} = 26 s$

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