Q. A current carrying coil is placed with its axis parallel to N-S direction. Let horizontal component of earth’s magnetic field be $H_{0}$ and magnetic field inside the loop is $H.$ If a magnet is suspended inside the loop, it makes angle $\theta$ with H. Then $\theta$ is equal to
A) ${\tan^{- 1}\left( \frac{H_{0}}{H} \right)}\ $
B) ${\tan^{- 1}\left( \frac{H}{H_{0}} \right)}\ $
C) ${cosec}^{- 1}\left( \frac{H}{H_{0}} \right)$
D) $\cot^{- 1}\left( \frac{H_{0}}{H} \right)$
Explanation
The correct answer is Option A: ${\tan^{- 1}\left( \frac{H_{0}}{H} \right)}\ $.
A detailed explanation for this question is being prepared.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.