Explain, on the basis of the potentials at the two junctions, why the galvanometer…

PHYSICS · Subjective · CBSE · Physics · Current Electricity · Current Electricity

Problem

Explain, on the basis of the potentials at the two junctions, why the galvanometer shows no deflection when a bridge with arm resistances

R_1, R_2, R_3

and

R_4

is adjusted so that

\dfrac{R_1}{R_2}=\dfrac{R_3}{R_4}