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In a meter bridge, the value of resistan...

In a meter bridge, the value of resistance in the resistance box is `10Omega`. The balancing length is `l_(1)=55 cm`. Find the value of dunknown resistance.

Text Solution

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`Q = 10 Omega`
`P/Q =l_1/(100 - l_1) = l_1/l_2`
`P = Q xx l_1/(100 - l_1) rArr P = (10 xx 55)/(100-55) rArr P = 550/45 = 12.2 Omega`
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