First slide

combination of resistance

Question

In the following Wheatstone bridge, P/Q = R/S. If key K is closed, then the galvanometer will show deflection

Easy

A

in left side
B

in right side
C

no deflection
D

in either side

Solution

Pressing the key does not disturb current in all resistances as the bridge is balanced. Therefore, deflection in the galvanometer in whatever direction it was, will stay.

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