A compass needle oscillates | Magnetism JEE Main 2023

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JEE MAIN 2023

12-04-2023 S1

Question

A compass needle oscillates 20 times per minute at a place where the dip is $30^{\circ}$ and 30 times per minute where the dip is $60^{\circ}$. The ratio of total magnetic field due to the earth at two place respectively is $\frac{4}{\sqrt{x}}$. The value of $x$ is:

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