With a resistance P Omega in the left ga...

With a resistance `P Omega` in the left gap and another resistance `Q Omega` in the right gap of a meter bridge, the balance point is obtained at 40 cm. When a resistance of `6 Omega` is connected across Q, the balance point shifts to 50 cm. The value of resistance P is

A

6

B

3

C

1

D

2

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