engineering physics MCQ #962

A potentiometer wire has a length of 10 m and resistance 5 ohms. The potential gradient is

engineering physics MCQ #962

  1. Question 1

    Q1. A potentiometer wire has a length of 10 m and resistance 5 ohms. The potential gradient is

    • A) 0.5 V/m
    • B) 0.1 V/m
    • C) 1 V/m
    • D) 2 V/m

    Answer: 0.5 V/m

    Explanation: Potential gradient = V/l = (I*R)/l = (E/(R + r))*R/l, but for a simple potentiometer, it is given by the voltage drop per unit length.