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The temperature coefficient of resistanc...

The temperature coefficient of resistance of a conductor is

A

`0.042^(@)C^(-1)`

B

`0.003^(@) C^(-1)`

C

`0.033^(@)C^(-1)`

D

`0.010^(@) C^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
B
`16 = R_(0)[1+ alpha(15-T_(0))]`
`20 = R_(0)[1 + alpha(100 - T_(0))]`
Assuming `T_(0) = 0^(@)` C, as a general convention.
`rArr 16/20 =(1 + alpha xx 15)/(1 + alpha xx 100)`
`rArr alpha = 0.003^(@) C^(-1)`
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