Current Electricity Charging Discharging Of Capacitors Question 223
Question: The resistance of a galvanometer is 25 ohm and it requires $ 50,\mu A $ for full deflection. The value of the shunt resistance required to convert it into an ammeter of 5 amp is
[MP PMT 1994; BHU 1997]
Options:
A) $ 2.5\times {{10}^{-4}}ohm $
B) $ 1.25\times {{10}^{-3}}ohm $
C) 0.05 ohm
D) 2.5 ohm
Show Answer
Answer:
Correct Answer: A
Solution:
$ S=\frac{G}{\frac{i}{i _{g}}-1}=\frac{25}{\frac{5}{50\times {{10}^{-6}}}-1} $
$ =\frac{25}{10^{5}-1}=\frac{25}{10^{5}}=2.5\times {{10}^{-4}}\Omega $
BETA
