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In the circuit shows in Fig. 6.20, a met...

In the circuit shows in Fig. `6.20`, a meter bridge is in its balance state. The meter bridge wire has a resistance of `1 Omega cm^(-1)`. Calculate the value of the unknow resistance `X` and the battery of negligible internal resistance.

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For balanced wheatstone bridge, `(X)/(40) = (3)/(60)` or `X = 2 Omega`
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