Physics, asked by Deepika2289, 1 year ago

On what factor does potential gradient of potentiometer wire depends

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Answered by Ak11y
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What are the factor does the potential gradient of the potentiometer wire depend ?



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Solution :

The fall of potential across a potentiometer wire of length l is given by

V=IRV=IR

=IρlA=IρlA

Potential gradient k=vl=IρAk=vl=IρA

=k∞I=>=k∞I=> current passing through the potentio meter wire.

(ii) k∞ρk∞ρ (ie) specific resistance of the material of the potentiometer wire.

(iii) k∞1Ak∞1A

(ie) area of cross section of the wire
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