Physics

Problem

Identify the correct balance condition for a Wheatstone bridge having resistors

P,\,Q

in one arm and

R,\,S

in the other arm. The bridge is balanced when a)

\dfrac{P}{S}=\dfrac{R}{Q}

\dfrac{P}{Q}=\dfrac{R}{S}

P\,Q=R\,S

\dfrac{P}{Q}=\dfrac{S}{R}