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Q.

Two electric bulbs rated Question Image watts, V volts and Question Image watts, V volts are connected in parallel and applied across V volts. The total power (in watt) will be?


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a

Question Image

b

Question Image

c

Question Image

d

Question Image 

answer is A.

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Detailed Solution

Concept: First bulb resistance: Question Image Second bulb resistance: Question Image Since they are coupled in parallel, their equivalent resistance is given as follows:
Question ImageQuestion ImageQuestion ImageQuestion ImageQuestion ImageNow power, Question ImageQuestion ImageQuestion Image Hence, the correct answer option (1) .
 
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