In the given circuit, if no current flows through the galvanometer when the key K is closed, the bridge is balanced. The balancing condition for bridge is
A
C1C2=R1R2
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B
C1C2=R2R1
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C
C21C22=R1R2
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D
C21C22=R2R1
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Solution
The correct option is BC1C2=R2R1 In the steady state, no current is passing through the capacitor.
Let the charge on each caapcitor be q. Since the current through galvanometer is zero.
∴I1=I2
In the balanced Wheatstone bridge, the potential difference between the ends of the galvanometer will be zero.