Question

principle of potentiometer​

Answer 1

The potentiometer works on the principle that when a constant current flows through a wire of uniform cross sectional area, potential difference between its two points is directly proportional to the length of the wire between the two points.

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Answer 2

Answer:

When a constant current flows through a wire of uniform area of cross -section from potential difference between 2 points on the wire is directly proportional to length of the wire between the 2 points. (E =Irl)

E α l