In a Wheatstone bridge, three resistances P, Q and R are connected in the three arms and…
Physics · NEET · NTA Exams — Current Electricity
In a Wheatstone bridge, three resistances P, Q and R are connected in the three arms and the fourth arm is formed by two resistances S1 and S2 connected in parallel. The condition for the bridge to be balanced will be
- \(\frac{P}{Q}=\frac{Z R}{S_{1}+S_{2}}\)
- \(\frac{P}{Q}=\frac{R\left[S_{1}+S_{2}\right]}{S_{1} S_{2}}\)
- \(\frac{P}{Q}=\frac{R\left[S_{1}+S_{2}\right]}{2 S_{1} S_{2}}\)
- \(\frac{P}{Q}=\frac{R}{S_{1}+S_{2}}\)
Answer
(B) P Q = R [S_ 1 +S_ 2 ] S_ 1 S_ 2
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