Question

state the working principle of a potentiometer using the necessary circuit diagram explain briefly​

Answer 1

Answer:

principle of potentiometer:-

"it works on the principle that the potential difference across any part of a uniform wire is directly proportional to the length, when a constant current flows through the wire"....

V=Ipl

v is directly proportional to l...

let 'v' be the potential difference across the wire of length

R is resistance

A be uniform area of cross-section

I be the current passing through the wire then according to the ohms law,

v=IR

But, R=pl/A

where p=resistivity of the wire

v=Ipl/A

But, IP/A=k

v=Kl

where k is the constant.....

Explanation:

Hope it helps you......