A compass needle oscillates 20 times per minute at a place where dip i – InterviewSolution

1.	A compass needle oscillates 20 times per minute at a place where dip is 45∘ and 30 times per minute where dip is 30∘. The ratio of horizontal component of earth's magnetic at second to first place is-
Answer» A compass needle oscillates $20$ times per minute at a place where dip is $45^{\circ}$ and $30$ times per minute where dip is $30^{\circ}$ . The ratio of horizontal component of earth's magnetic at second to first place is-

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