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Q.

An electric heater is rated 1500 W. Then the work done by it in an hour is 

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a

54×105 J

b

150 J

c

15000 J

d

54×106 J

answer is C.

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Detailed Solution

power p = 1500 W , Time t=1hr=3600s

p=Wt⇒W=p×t

=1500×60×60s

=5400000

W=54×105J

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