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In the given circuit , the three lamps a...

In the given circuit , the three lamps are identical When switch S is closed then

A

Lamp P becomes dimmer

B

Lamp P is as bright as lamp Q

C

Lamp Q is not as bright as lamp R

D

Lamp P remains as bright as before .

Text Solution

Verified by Experts

The correct Answer is:
D
When the switch S is closed , the lamp P is in parallel to the series combination of lamps Q and R , Hence brightness of lamp P will remain same .
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