In the shown arrangement of the experiment of the meter bridge if A C corresponding to null deflection of galvanometer is x , what would be its value if the radius of the wire AB is doubled?

Step-by-step solution

At null point R₁ R₂ = R₃ R₄ = x 100-x If radius of the wire is doubled, then the resistance of A C will change and also the resistance of C B will change. But since R₁ R₂ does not change so, R₃ R₄ should also not change at null point. Therefore the point C does not change.