91- 6303239042
Wheatstone Bridge
### Condition for Balance
$$\frac{P}{Q}=\frac{R}{S}$$
### Terminologies
- P,Q,R,S → Resistances of four arms.
### Conditions / Special Cases
At balance:
$$I_g=0$$
where:
- Ig → Current through galvanometer.
### Usage
- Used for measuring unknown resistance.
