Question

Draw. Wheatstone's bridge circuit and write the condition for its balance.

Answer 1

Wheatstone's bridge is shown in the above figure with resistances $P,Q,R$ and $S$.

The Wheatstone's bridge is said to be balance if no current flows through the galvanometer $G$.

Condition for balanced Wheatstone's bridge : $\frac{P}{Q}=\frac{R}{S}$