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  • With the help of potentiometer, we can determine the value of emf of a given cell. The sensitivity of the potentiometer is (A) directly proportional to the length of the potentiometer wir

With the help of potentiometer, we can determine the value of emf of a given cell. The sensitivity of the potentiometer is

(A) directly proportional to the length of the potentiometer wire

(B) directly proportional to the potential gradient of the wire

(C) inversely proportional to the potential gradient of the wire

(D) inversely proportional to the length of the potentiometer wire

Choose the correct option for the above statements:

Option: 1

A only


Option: 2

C only


Option: 3

A and C only


Option: 4

B and D only


Answers (1)

best_answer

If on displacing the jockey slightly from the null point position, the galvanometer shows a large deflection, then the potentiometer is said to be sensitive. The sensitivity of the potentiometer depends upon the potential gradient along the wire. The smaller the potential gradient greater will be sensitivity.
Sensitivity \uparrow, potential gradient \downarrow , length \uparrow
Sensitivity \propto length
Sensitivity \propto \frac{1} {\text { Potential gradient }}

Posted by

sudhir.kumar

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