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Q.

What happens when the switch is turned off in the adjoining figure which shows two bulbs B1 and B2, resistor R and an inductor L ?

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a

Both B1 and B2 die out promptly

b

Both B1 and B2 die with some delay

c

B1 dies out promptly but B2 with some delay

d

B2 dies out promptly but B1 with some delay

answer is B.

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Detailed Solution

Both B1 and B2 die with some delay as they are forming a close loop current will be same for them while decaying.
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