NEET Solved Paper 2018 Question 29
Question: Current sensitivity of a moving coil galvanometer is 5 div/mA and its voltage sensitivity (angular deflection per unit voltage applied) is 20 div/V. The resistance of the galvanometer is [NEET - 2018]
Options:
A) $ 250\Omega $
B) $ 25\Omega $
C) $ 40\Omega $
D) $ 500\Omega $
Show Answer
Answer:
Correct Answer: A
Solution:
Current sensitivity $ {I_S}\text{=}\frac{NBA}{C} $
Voltage sensitivity $ {V_S}\text{=}\frac{NBA}{C{R_G}} $
So, resistance of galvanometer
$ {R_G}=\frac{I _{S}}{V _{S}}=\frac{5\times 1}{20\times {10^{-3}}}=\frac{5000}{20}=250\Omega $
