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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