METERBRIDGE

(A): In a meter bridge, If its wire is replaced by another wire having same length, made of same material but having twice the cross-sectional area, the accuracy decreases (R): If wire of meterbridge is replaced by another wire of same material having same cross-sectional area but of twice the length, accuracy remains same.

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

Two coils are connected in series in one gap of the meterbridge and null point is obtained of the middle of the wire by putting 75Omega in the other gap. Two coils are then connected in parallel and the null point is obtained again at the middle of the wire when the resistance in the other gap is changed by 57Omega . Find the resistance of each coil.

With a resistance R_1 in the left gap and a resistance R_2 in the right gap of a meterbridge, the null point is obtained at a distance of 70cm from the left end, when R_1 is reduced by 2Omega and R_2 is increased by 2Omega , the null point is obtained at 30cm from left end. Find the values of resistance R_1 and R_2 .

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

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