Definitions [9]
Define the following term regarding a bar magnet:
Magnetic axis
An imaginary line (XY) passing through the magnetic north pole and magnetic south pole of a bar magnet is called its magnetic axis.
Define the following term:
Angle of dip
The angle between the horizontal and earth’s magnetic field is known as the angle of dip.
Define natural magnet.
It is a piece of lodestone, which is a black iron oxide (Fe3 O4) called magnetite. The word lodestone means a leading stone.
Define the following term regarding a bar magnet:
Magnetic field
The region around a magnet where its magnetic force can be experienced is called the magnetic field.
Define artificial magnet.
Pieces of iron and other magnetic materials which can be made to acquire the properties of natural magnets are called artificial magnets.
Define electromagnet.
lt is a solenoid with a soft iron core placed inside it. When current is passed through the solenoid, the soft iron core becomes a temporary magnet.
Define the following term regarding a bar magnet:
Effective length
The distance (NS) between the north pole and south pole of a magnet is called the length or effective length of the magnet.
Define the terms magnet and magnetism.
The substances which have the property of attracting small pieces of iron, nickel, cobalt, etc, are called magnets, and this property of attraction is called magnetism.
Define the following term regarding a bar magnet:
Magnetic equator
An imaginary line (PQ) bisecting the effective length of a magnet is called the magnetic equator of the magnet.
