Question

Obtain the condition of balance of a Wheatstone bridge.

Hint:

For a balanced Wheatstone bridge, always remember: \[ \boxed{ \frac{P}{Q} = \frac{R}{S} } \] or equivalently, \[ \boxed{ PS=QR } \] At balance:
• Current through the galvanometer is zero.
• Potentials of the galvanometer junctions are equal.
• The bridge can be used to determine an unknown resistance accurately.

Answer 1