Temperature coefficient of resistance - - and resistivity - of a potentiometer wire must be-

The correct option is B low and highThe resistance of the potentiometer should not change much #160;with the increase of temperature. Therefore α shou ...

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Standard XII

Physics

Dependence of Resistance on Temperature

Temperature c...

Question

Temperature coefficient of resistance ' $α$ ' and resistivity $ρ$ of a potentiometer wire must be:

high and low

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low and high

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low and low

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high and high

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Solution

The correct option is B low and high
The resistance of the potentiometer should not change much with the increase of temperature. Therefore $α$ should be low and $ρ$ should be high for potentiometer.

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Temperature coefficient of resistance 'α' and resistivity ρ of a potentiometer wire must be:

The correct option is B low and highThe resistance of the potentiometer should not change much with the increase of temperature. Therefore α should be low and ρ should be high for potentiometer.

Temperature coefficient of resistance ' $α$ ' and resistivity $ρ$ of a potentiometer wire must be:

The correct option is B low and high
The resistance of the potentiometer should not change much with the increase of temperature. Therefore $α$ should be low and $ρ$ should be high for potentiometer.