The thermo e.m.f. of a thermocouple is 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
As we learnt in
Galvanometer -
It is an instrument used to detect small current passing through it by showing deflection.
- wherein
i.e. moving coil galvanometer
moving magnet galvanometer
Let the smallest be
thermo emf volt
Potential difference acrons galvanometer
volt
Option 1)
This option is correct.
Option 2)
This option is incorrect.
Option 3)
This option is incorrect.
Option 4)
This option is incorrect.
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