Question

A compass needle will show which one of the following directions at the earth's magnetic pole?

• A. bent at ${45}^{\circ }$ to the vertical
• B. vertical
• C. horizontal
• D. no particular direction

Answer 1

The correct option is B

vertical

Explanation :

At the magnetic poles of earth , the earth’s magnetic field is in vertical direction and there is no horizontal component of the field .

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At poles the magnetic field is perpendicular to the surface of earth. Thus, the compass needle will become vertical at poles (aligned along the earth’s field).

Hence, correct option is $\left(a\right)$.