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Physics - Current Electricity Question with Solution | TestHub

PhysicsCurrent ElectricityElectrical instrumentHard2 minPYQ_2011

PhysicsHardsingle choice

A 2 V battery, a $15Ω$ resistor and a potentiometer of $100 cm$ length, all are connected in series. If the resistance of potentiometer wire is $5Ω$ , then the potential gradient of the potentiometer wire, is

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Answer:

Solution:

Potential gradient $\frac{d v}{d x} = \frac{e}{( R + R _{h} + r )} \cdot \frac{R}{L}$ $= \frac{2}{( 15 + 5 + 0 )} \times \frac{5}{1} = 0.5 V / m = 0.005 V / cm$

Stream:VITEEESubject:PhysicsTopic:Current ElectricitySubtopic:Electrical instrument

⏱ 2mℹ️ Source: PYQ_2011

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