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MHT CET 2022 Physics question

PhysicsCurrent ElectricityMHT CET 2022

Let 'A' be the cross-sectional area and '' be the specific resistance of a potentiometer wire. If 'I' is the current passing through the wire, then the potential gradient along the length of the wire is

Answer: (D)

Solution

Potential gradient is the potential drop per unit length: . The potential drop across a length of the wire is with . So \dfrac{I\varrho L/A}{L}$ =

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Question ID VK-093936