The direction of a magnetic field at a point on a magnetic field line is given by :

1. a tangent at that point
2. a normal bisector at that point
3. both tangent and normal bisector at that point
4. none of the above

A soft iron bar is tied by a thread in the middle and is suspended from a rigid support such that it is free to rotate in a horizontal plane. It shall come to rest :

1. along north-south direction
2. along east-west direction
3. equally inclined to N-S and E-W direction
4. in any direction

A freely suspended bar magnet is taken to the north pole of the earth. It comes to rest :

1. in any direction
2. parallel to the earth’s surface
3. nearly vertical with the south pole in a downward direction
4. nearly vertical with the north pole in a downward direction.

Which of the following is not a correct statement for a magnet placed in the earth's magnetic field ?

1. Neutral points are always at an equal distance from the magnet.
2. The position of neutral points depends on the direction of the magnet in the earth’s magnetic field.
3. The position of neutral points does not depend on the direction of the magnet.
4. The magnetic field strength is zero at the neutral points.