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In a metrebridge, the gaps are closed by...

In a metrebridge, the gaps are closed by two resistances P and Q and the balance point is obtained at 40 cm. When Q is shunted by a resistance of `10Omega`, the balance point shifts to 50 cm. The values of P and Q are

A

`10//3Omega,5Omega`

B

`20Omega,30Omega`

C

`10Omega,15Omega`

D

`5Omega,15//2Omega`

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