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Physics - Current Electricity Question with Solution | TestHub

PhysicsCurrent ElectricityCircuit AnalysisMedium2 minPYQ_2021

PhysicsMediumsingle choice

In a Wheatstone bridge, three resistance $P, Q$ and $R$ are connected in the three arms and the fourth arm is formed by two resistances $S_{1}$ and $S_{2}$ connected in parallel. The condition for the bridge to be balanced is

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Solution:

For balanced Wheatstone's bridge we have $\frac{P}{Q} = \frac{R}{S}$ Where $S$ is the equivalent resistance of $S_{1}$ and $S_{2}$ in parallel $S = \frac{S _{1} S _{2}}{S _{1} + S _{2}}$ $∴ \frac{P}{Q} = \frac{R ( S _{1} + S _{2} )}{S _{1} S _{2}}$

Stream:MHT_CETSubject:PhysicsTopic:Current ElectricitySubtopic:Circuit Analysis

⏱ 2mℹ️ Source: PYQ_2021

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