PROOF OF WHEATSTONE BRIDGE PRINCIPLE
Current Electricity 02 & Electric Measurement :: Four resistances P,Q,R,S and A galvanometer form a quadrilateral to which a battery along with a one way key is connected to form Wheatstone Bridge . If the potentials at the two ends of the galvanometer are same, no current flows through the galvanometer and Galvanometer shows no deflection . The balanced condition is obtained . Hence , (P/Q)=(R/S). ... Class 12 Physics