NEET Solved Paper 2014 Question 30
Question: In an ammeter 0.2% of main current passes through the galvanometer. If resistance of galvanometer is G, the resistance of ammeter will be [AIPMT 2014]
Options:
A) $ \frac{1}{499}G $
B) $ \frac{499}{500}G $
C) $ \frac{1}{500}G $
D) $ \frac{500}{499}G $
Show Answer
Answer:
Correct Answer: A
Solution:
For ammeter $ 0.0002l\times G=0.998l\times r _{g} $ $ r _{g}=\frac{0.002}{0.998}G $
Þ $ r _{g}=0.002004G=\frac{1}{499}\times G $
Resistance of ammeter is approximately equal to resistance of shunts.
