Current Electricity and Electrical InstrumentEasy
Question
The thermo e.m.f. of a thermo-couple is 25 μV/oC at room temperature. A galvanometer of 40 ohm resistance, capable of detecting current as low as 10-5 A, is connected with the thermocouple. The smallest temperature difference that can be detected by this system is
Options
A.16oC
B.12oC
C.8oC
D.20oC
Solution
E = 25 θ × 10-6V
IR = 10-5 × 40 = 4 × 10-4V
= 16oC
IR = 10-5 × 40 = 4 × 10-4V
= 16oCCreate a free account to view solution
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