Physics - Current Electricity Question with Solution | TestHub

PhysicsCurrent ElectricityElectrical instrumentEasy2 minPYQ_2016

PhysicsEasysingle choice

A potentiometer wire is $100 cm$ long and a constant potential difference is maintained across it. Two cells are connected in series first to support one another and then in opposite direction. The balance points are obtained at $50 cm$ and $10 cm$ from the positive end of the wire in the two cases. The ratio of EMF's is :NEET 2016 (Phase 1)

Options:

Answer:

Solution:

as $E \propto L$

$\frac{E_{1} + E_{2}}{E_{1} - E_{2}} = \frac{λ 50}{λ 10}$

$E_{1} + E_{2} = 5 E_{1} - 5 E_{2}$

$6 E_{2} = 4 E_{1}$

$\frac{3}{2} = \frac{E_{1}}{E_{2}}$

Stream:NEETSubject:PhysicsTopic:Current ElectricitySubtopic:Electrical instrument

⏱ 2mℹ️ Source: PYQ_2016

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