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Coefficient of linear expansion of mater...

Coefficient of linear expansion of material of resistor is `alph`. Its temperature coefficient of resistivity and resistance are `alpha_(p)` and `alpha_(R )` , then correct relation is

A

`alpha_(R ) = alpha_(p) - alpha`

B

`alpha_(R ) = alpha_(p) + alpha`

C

`alpha_(R ) = alpha_(p) + 3alpha`

D

`alpha_(R ) = alpha_(p) -3alpha`

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