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At the magnetic poles of the earth a compass needle will be
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Correct option is C
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.Similar Questions
A uniform magnetic needle is suspended from its center by a thread. Its upper end is now loaded with a mass of 50 mg when the needle becomes horizontal. If the strength of each pole is 98.1 ab-amp.cm & g is , then the vertical component of the earth’s magnetic field is
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