Magnetism Question 129
Question: In a tangent galvanometer a current of 0.1 A produces a deflection of 30o. The current required to produce a deflection of 60o is
[MP PET 2003]
Options:
A) 0.2 A
B) 0.3 A
C) 0.4 A
D) 0.5 A
Show Answer
Answer:
Correct Answer: B
Solution:
$ i\propto \tan \varphi \Rightarrow \frac{i _{1}}{i _{2}}=\frac{\tan {\varphi _{1}}}{\tan {\varphi _{2}}} $
$ \Rightarrow \frac{0.1}{i _{2}}=\frac{\tan 30{}^\circ }{\tan 60{}^\circ }=\frac{1}{3}\Rightarrow i _{2}=0.3A $
BETA
