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Physics - Current Electricity Question with Solution | TestHub

PhysicsCurrent ElectricityElectrical instrumentEasy2 minPYQ_2020

PhysicsEasysingle choice

A potentiometer wire is $4 m$ long and potential difference of $3 V$ is maintained between the ends. The e.m.f. of the cell which balances against a length of $100 cm$ of the potentiometer wire is

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Answer:

Solution:

Potential gradient $= \frac{3}{4} \frac{V}{m}$ So, emf against $100 cm = \frac{3}{4} \times 1 V = 0.75 V$

Stream:MHT_CETSubject:PhysicsTopic:Current ElectricitySubtopic:Electrical instrument

⏱ 2mℹ️ Source: PYQ_2020

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