When a bar magnet is placed in earth's magnetic field, neutral points are obtained. At neutral point

Net magnet field is zero

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Earth's magnetic field is not present

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Magnetic field due to bar magnet is not present

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Horizontal component of earth's magnetic field and magnetic field due to bar magnet are present and they are equal in magnitude and opposite in direction.

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Solution

The correct option is D Horizontal component of earth's magnetic field and magnetic field due to bar magnet are present and they are equal in magnitude and opposite in direction.
The magnetic field line of the earth resemble these of a bar magnet.
Its magnetic field lines are parallel, at equator to earth surface.
These are horizontal earth magnetic field.
When the magnetic and horizontal components of earth's magnetic field are equal and oppose makes the point a neutral point.

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Similar questions

Q. A bar magnet is situated on a table along east-west direction in the magnetic field of earth. The number of neutral points, where the magnetic field is zero, are

Magnetic field at any point due to bar magnet.

Q. Assertion :There are two neutral points on a horizontal board when a magnet is held vertically on the board. Reason: At the neutral point the net magnetic field due to the magnetic and magnetic field of the earth is zero.

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Complete the following sentences :

(a) If the field lines in a magnetic field are parallel and equidistant, the magnetic field is .............

(b) At a neutral point, the resultant magnetic field is ..........

(c) The neutral points of a bar magnet kept with its north pole pointing towards geographic north are located .......................

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