A magnet is placed earth's magnetic field with south pole of the magnet pointing north. At the neutral point :
A
The earth's magnetic field is zero
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B
The fields of the magnet and the earth are equal and in opposite direction.
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C
The magnet's magnetic field is zero.
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D
The net magnetic field is zero.
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Solution
The correct options are B The fields of the magnet and the earth are equal and in opposite direction. D The net magnetic field is zero.
If the magnet is placed as the north pole, the magnet is aligned with south of earth magnetic field then at a neutral point, that is the point where magnetic forces are equal and opposite thus fields of both are equal and opposite and Net field is zero.