Physics, asked by Harshika2405, 9 months ago

please solve this question ASAP​

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Answered by abhi52329
1

When the switch is open

Total resistance is 4R (Three bulbs and internal resistance in series)

Power is (E*E) /4R

When the switch is closed

Total resistance is

(3R)||(3R) +R

which is equal to (3R)/2 +R= (5R)/2

Power is (E*E*2)/5R

Hence Ratio of powers is 5/8

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