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The temperature coefficient of resistanc...

The temperature coefficient of resistance of platinum is `alpha=3.92xx10^(-3)K^(-1)` at `20^(@)C`. Find the temperature at which the increase in the resistance of platinum wire is `10%` of its value at `20^(@)C`

A

`40.5^(@)`C

B

`45.5^(@)`

C

`48.5^(@)`

D

`43.5^(@)` C

Text Solution

Verified by Experts

The correct Answer is:
B
`Deltat =(R_(2)-R_(1))/(R_(1)alpha)`
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