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Physics - Current Electricity Question with Solution | TestHub

PhysicsCurrent ElectricityElectrical instrumentMedium2 minPYQ_2022

PhysicsMediumsingle choice

A galvanometer of resistance ' $G$ ' is shunted by a resistance of $5Ω$ . To keep the main current in the circuit unchanged, the resistance to be put in series with the same galvanometer is

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Answer:

Solution:

Current will be unchanged if resistance remains same to $G = \frac{GS}{G + S} + R \Rightarrow R = G - \frac{GS}{G + S} = \frac{G ^{2}}{G + S}$

Stream:MHT_CETSubject:PhysicsTopic:Current ElectricitySubtopic:Electrical instrument

⏱ 2mℹ️ Source: PYQ_2022

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