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Resistor

All resistanc...

Question

All resistances in the circuit in figure are of R ohms each. The switch is initially open. what happens to the lamp's intensity when the switch is closed?

A

Increases

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B

Decreases

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C

Remains same

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D

Answer depends on the value of R

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Solution

The correct option is C Remains same
As the given bridge is balanced wheatstone bridge, current flowing through the lamp will remain same irrespective of the state of switch. Hence intensity of lamp will remain same.

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