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Series Combination of Cells

A 20 V batt...

Question

A $20 V$ battery connected to a bulb drives a current of $5 A$ through it. The energy supplied by the battery in $10$ mintues is:

60 J

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60 k J

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10 J

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10 k J

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Solution

The correct option is B $60 k J$
Electric power, $P = I \times V = 20 \times 5 = 100 W$
So, energy supplied, $E = P \times t = 100 \times 10 \times 60 J = 60000 J = 60 k J$

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