Physics - Current Electricity Question with Solution | TestHub

PhysicsCurrent ElectricityElectrical instrumentMedium2 minPYQ_2022

PhysicsMediumsingle choice

In a potentiometer experiment, the null point is obtained on $7^{th}$ wire for given cell. To shift the null point on $9^{th}$ wire for the same cell what should we do?

Options:

Answer:

Solution:

Potential gradient, $(\frac{Δ V}{L}) = \frac{[ \frac{ER}{( R + R ^{'} )} ]}{L}$ To increase the balancing length, we need to decrease the potential gradient. Hence, we have to increase the resistance in main circuit.

Stream:MHT_CETSubject:PhysicsTopic:Current ElectricitySubtopic:Electrical instrument

⏱ 2mℹ️ Source: PYQ_2022

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