A current carrying coil is placed with its axis perpendicular to … - Vidyadip

MCQ

A current carrying coil is placed with its axis perpendicular to N-S direction. Let horizontal component of earth's magnetic field be $\mathrm{H}_{\mathrm{o}}$ and magnetic field inside the loop is H. If a magnet is suspended inside the loop, it makes angle θ with H. Then θ =

✓
$\tan ^{-1}\left(\frac{\mathrm{H}_{\mathrm{o}}}{\mathrm{H}}\right)$
B
$\tan ^{-1}\left(\frac{\mathrm{H}}{\mathrm{H}_\mathrm{o}}\right)$
C
$\operatorname{cosec}^{-1}\left(\frac{\mathrm{H}}{\mathrm{H}_\mathrm{o}}\right)$
D
$\cot ^{-1}\left(\frac{\mathrm{H}_\mathrm{o}}{\mathrm{H}}\right)$

✓

Answer

Correct option: A.

$\tan ^{-1}\left(\frac{\mathrm{H}_{\mathrm{o}}}{\mathrm{H}}\right)$

(a) $\tan ^{-1}\left(\frac{\mathrm{H}_{\mathrm{o}}}{\mathrm{H}}\right)$

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