Magnetism Question 124
Question: When 2 amperes current is passed through a tangent galvanometer, it gives a deflection of 30o. For 60o deflection, the current must be
[MP PMT 2001]
Options:
A) 1 amp
B) $ 2\sqrt{3},amp $
C) 4 amp
D) 6 amp
Show Answer
Answer:
Correct Answer: D
Solution:
$ i\propto \tan \varphi \Rightarrow \frac{i _{1}}{i _{2}}=\frac{\tan {\varphi _{1}}}{\tan {\varphi _{2}}} $
$ \Rightarrow \frac{2}{i _{2}}=\frac{\tan 30}{\tan 60}\Rightarrow i _{2}=6\ amp $
BETA
