A magnet is suspended to oscillate in the horizontal plane. It ma… - Vidyadip

MCQ

A magnet is suspended to oscillate in the horizontal plane. It makes 20 oscillations per minute at a place where the dip angle is $30^{\circ}$ and 15 oscillations per minute where the dip angle is $60^{\circ}$. The ratio of the Earth's total magnetic field at the two places is

A
$3 \sqrt{3}: 16$
✓
$16: 9 \sqrt{3}$
C
$4: 9 \sqrt{3}$
D
$9: 16 \sqrt{3}$.

✓

Answer

Correct option: B.

$16: 9 \sqrt{3}$

$16: 9 \sqrt{3}$

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