Current Electricity Charging Discharging Of Capacitors Question 773
Question: The smallest temperature difference that can be measured with a combination of a thermocouple of thermo e.m.f. 30mV per degree and a galvanometer of 50 ohm resistance, capable of measuring a minimum current of 3 ´ 10?7 amp is
[MP PET 2000]
Options:
A) 0.5 degree
B) 1.0 degree
C) 1.5 degree
D) 2.0 degree
Show Answer
Answer:
Correct Answer: A
Solution:
$ i=\frac{e}{R}\Rightarrow 3\times {{10}^{-7}}=\frac{(30\times {{10}^{-6}})\times \theta }{50} $
Therefore $ \theta =0.5{}^\circ $
BETA
