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A thermocouple of negligible resistance ...

A thermocouple of negligible resistance produces an e.m.f. of `40mu (V)//""^(0)C` in the linear range of temperature. A galvanometer of resistance 10 ohm whose sensitivity is 1 `muA//"division"`, is employed with the thermocouple. The smallest value of temperature difference that can be detected by system will be

A

`0.1^(@)C`

B

`0.25^(@)C`

C

`0.5^(@)C`

D

`1^(@)C`

Text Solution

Verified by Experts

The correct Answer is:
B
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