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Q.

A lamp consumes 1000J of electrical energy in 10s. What will be its power?


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a

1000 W

b

100 W

c

0.1 W

d

0.01 W 

answer is B.

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Detailed Solution

Concept- The amount of work done in a given amount of time is referred to as power. The SI unit of power is watts (W).
The mathematical expression would be written as-
Question ImageGiven,
Work done = 1000 J and time = 10 sec
Therefore,
Question ImageHence, the correct answer is option 2.
 
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A lamp consumes 1000J of electrical energy in 10s. What will be its power?