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The smallest temperature difference that...

The smallest temperature difference that can be measured with a combination of a thermocouple of thermo e.m.f. `30mu V` per degree and a galvanometer of 50 ohm resistance, capable of measuring a minimum current of `3xx10^(-7)` amp is

A

0.5 degree

B

1.0degree

C

1.5degree

D

2.0degree

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