In a Wheatstone's bridge all the four arms have equal resistance $R$. If the resistance of the galva

Question

In a Wheatstone's bridge all the four arms have equal resistance $R$. If the resistance of the galvanometer arm is also $R$, the equivalent resistance of the combination as seen by the battery is\

Professor PC Thomas Classes · Answer

(c) : In balance Wheatstone bridge, the galvanometer arm can be neglected. So equivalent resistance will be\ $\frac{2 R 	imes 2 R}{2 R+2 R}=\frac{4 R^{2}}{4 R}=R$\