An unknown resistance R(1) is connected ...

An unknown resistance` R_(1)` is connected is series with a resistance of `10 Omega.` This combination is connected to one gap of a meter bridge, while other gap is connected to another resistance `R_(2)`. The balance point is at 50 cm Now , when the 10 Omega resistance is removed, the balanced point shifts to 40 cm Then the value of `R_(1) `is.

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