AIPMT MAINS2011Physics-Thermodynamics
AIPMT MAINS 2011 Physics Thermocouples MCQ Question
Type: MCQ-numerical-Medium-Class 11
A thermocouple of negligible resistance produces an e.m.f. of 40 μV/°C in the linear range of temperature. A galvanometer of resistance 10 Ω whose sensitivity is 1 μA/div, is employed with the thermocouple. The smallest value of temperature difference that can be detected by the system will be
A
0.1°C
B
0.25°C
C
0.5°C
D
1°C
Correct Answer
Option B
Detailed Explanation
The smallest detectable temperature difference is calculated using the sensitivity of the galvanometer and the e.m.f. produced per degree Celsius. It is 0.25°C.
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