Physics
Which of the following is not a correct statement for a magnet placed in the earth's magnetic field ?
- Neutral points are always at an equal distance from the magnet.
- The position of neutral points depends on the direction of the magnet in the earth’s magnetic field.
- The position of neutral points does not depend on the direction of the magnet.
- The magnetic field strength is zero at the neutral points.
Answer
The position of neutral points does not depend on the direction of the magnet.
Reason — As neutral points are the points at which two magnetic fields are equal in magnitude but opposite in direction, hence, the position of neutral points depends on the direction of the magnet. Therefore, the statement "The position of neutral points does not depend on the direction of the magnet" is incorrect.
Related Questions
The figure given below shows two iron nails attached to the end of a magnet. Choose the correct figure:
A freely suspended bar magnet is taken to the north pole of the earth. It comes to rest :
- in any direction
- parallel to the earth’s surface
- nearly vertical with the south pole in a downward direction
- nearly vertical with the north pole in a downward direction.
Fill in the blanks to complete the sentences:
(a) Two ends of a magnet are called ……………
(b) Unlike poles of a magnet …………… each other.
(c) Like poles of a magnet …………… each other.
(d) A freely suspended magnet rests in the geographic …………… direction.
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 it's north pole pointing towards geographic north are located …………… .