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Physics - Current Electricity Question with Solution | TestHub

PhysicsCurrent ElectricityElectrical instrumentEasy2 minPYQ_2020

PhysicsEasysingle choice

In the primary circuit of a potentiometer, a cell of E.M.F. $1 V$ and a rheostat of $15 Ω$ are connected in series. If the resistance of the potentiometer wire is $10 Ω$ , the minimum voltage at the ends of the wire (in $V$ ) will be

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Answer:

Solution:

Voltage is minimum, when resistance is maximum. Therefore minimum voltage across the ends the wire is

$V = \frac{E}{R_{h} + R_{P}} R_{P}$

$V = \frac{1}{15 + 10} (10)$

$V = 0.4 V$

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:Current ElectricitySubtopic:Electrical instrument

⏱ 2mℹ️ Source: PYQ_2020

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