Match List I with list II and select the correct answer using the code given below with lists:

List I		List II
(Magnet)		(Property)
A	Artificial magnet	1	Long-lived
B	Permanent magnet	2	Last for an infinitely long period
C	Temporary magnet	3	short-lived
D	Earth as a magnet	4	induced current

CONCEPT:

• Artificial magnet is the type of magnets that are produced by man under influence of an external magnetic field. Bar magnet, Horseshoe magnet & Electromagnet are examples of artificial magnet.
• Permanent magnets are materials where the magnetic field is generated by the internal structure of the material itself The magnetite of Lodestone is an example of Natural magnets
• When an electric field passes through a conductor it generates a magnetic field
• The hence induced current is used to produce a Temporary magnet
• Earth is a giant magnet with north and south magnetic poles and a magnetic field called the magnetosphere
• It is believed that this magnetic field is produced because of the motion of charged particles due to the convection current inside the earth’s core.

EXPLANATION:

According to the given condition:

• Artificial magnet loses its magnetic field gradually with time hence we can say it is short-lived
• Unlike artificial magnet, the magnetization of Permanent magnet last for a large period of time hence it is Long-lived
• A temporary magnet or electromagnet produces a magnetic field only until the current is induced through the conductor.
• Earth acts as a magnet and it lasts for an infinitely long period.
• Hence the correct option is A.