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Physics - Current Electricity Question with Solution | TestHub

PhysicsCurrent ElectricityElectrical instrumentHard2 minPYQ_2012

PhysicsHardsingle choice

A galvanometer of resistance, $G$ is shunted by a resistance S ohm. To keep the main current in the circuit unchanged, the resistance to be put in series with the galvanometer is

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Answer:

Solution:

If resistance remains same so current will be unchanged.
$G = \frac{GS}{G + S} + R \Rightarrow R = G - \frac{GS}{G + S} or, R = \frac{G ^{2}}{G + S}$

Stream:VITEEESubject:PhysicsTopic:Current ElectricitySubtopic:Electrical instrument

⏱ 2mℹ️ Source: PYQ_2012

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