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MHT CET Medical202621 April 2026Evening ShiftPhysicsCurrent ElectricityActual

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

Options

  1. AIA
  2. BIA
  3. CI A
  4. DI A

Correct answer

C. I A

Step-by-step solution

Potential gradient is defined as the potential drop per unit length of the wire. Let V be the potential difference across a length L of the wire. By Ohm's law, V = IR The resistance R of the wire is given by R = L A Substituting the value of R , we get V = I ( L A ) The potential gradient is V L = I A Answer: I A

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