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  4. In an experiment of meter bridge, a null point is obtained at the centre of the bridge wire. When a resistance of 10 ohm is connected in one gap, the value of resistance in other gap is

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Q. In an experiment of meter bridge, a null point is obtained at the centre of the bridge wire. When a resistance of $10\, ohm$ is connected in one gap, the value of resistance in other gap is

Current Electricity

Solution:

Meter bridge is balanced, therefore
$\frac{P}{Q}=\frac{R}{S} \text { or } 1=\frac{10}{S} \Rightarrow S=10 \,ohm$