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A plantinum wire has resistance of 10 Om...

A plantinum wire has resistance of `10 Omega` at `0^(@)C` and `20 Omega` at `273^(@)C`. Find the value of coefficient of resistance.

A

273 per degree C

B

273 per degree K

C

`(1)/(273)` per degree C

D

`(1)/(273)` per degree K

Text Solution

Verified by Experts

The correct Answer is:
C
`R_(t)=R_(0)(1+alpha t)`
`:.alpha=(R_(1)-R_(0))/(R_(0)t)=(20-10)/(10xx273)`
`=(1)/(273)` per degree C
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