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Q.

The heat produced by 200 W electric heater in one hour is

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a

7 .2 \times 10^{5} J

b

72 \times 10^{5} J

c

62 \times 10^{5} J

d

6 .2 \times 10^{5} J

answer is A.

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Detailed Solution

$H = P t = 200 \times 3600 = 7.2 \times 10^{5} J$

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The heat produced by 200 W electric heater in one hour is