Meterbridge

When an unknown resistance and a resistance of 4 ohm are connected in the left and right gaps of Meterbridge, the balance point is obtained at 50 cm. The shift in the balance point if 4 ohm resistance is connectedin parallel in the right gap is

When an unknown resistance and a resistance of 4Omega are connected in the left and right gaps of a meterbridge, the balance point is obtained at 50 cm. the shift in the balance point if a 4Omega resistance is now connected in parallel to the resistance in the right gap is