Q.

At the magnetic poles of the earth a compass needle will be

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a

vertical

b

bent slightly

c

horizontally

d

inclined at 450 to the horizontal

answer is C.

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Detailed Solution

At the magnetic north (or) south pole, the horizontal component of the earth’s magnetic field is zero. Hence a compass needle which is free to rotate in a horizontal plane, thus can stay in any direction at the magnetic north or south pole.
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