Physics · 2022
JEE Main · 27 July 2022, Shift 2 · Q42
A compass needle of oscillation magnetometer oscillates 20 times per minute at a place P of dip 30°. The number of oscillations per minute become 10…
A compass needle of oscillation magnetometer oscillates $\displaystyle 20$ times per minute at a place $\displaystyle P$ of dip $\displaystyle 30$°. The number of oscillations per minute become $\displaystyle 10$ at another place Q of $\displaystyle 60$° dip. The ratio of the total magnetic field at the two places $\displaystyle \left(\mathrm{B}_{\mathrm{Q}}: \mathrm{B}_{\mathrm{P}}\right)$ is :
Official answer
(1)
$\displaystyle \sqrt{3}: 4$
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JEE Main 2022 Physics question, with the answer from NTA’s final answer key. Where our answers come from.