in the process of magnetisation of a bar which part gets magnetized
Answers
Answer:Method of Magnetisation
The main idea of magnetization is to cause the magnetic domain to point in one direction.
Method of Magnetisation
Stroking Method
Electrical Method using d.c
Stroking Method
Method of magnetisation: stroking
Procedure:
The steel bar is stroked with the same pole of the permanent magnet from one end to the other end in one direction.
The stroking magnet has to be lifted sufficiently high above the steel bar between successive strokes.
The steel bar will become a magnet with pole produced at the end where the strokes finish is opposite to the stroking pole used as the atomic magnets in the domain are attracted to the stroking pole.
Note:
When using two magnets, the stroking pole used in each magnet has to be opposite, and they stroke the steel bar in opposite direction.
Using two magnets to stoke is faster than that using one magnet.
Stroking method only produces weak magnets.
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Electrical Method using a direct current
Procedure:
Connect the solenoid to a direct current (d.c) supply.
Place the steel bar inside the solenoid.
Switch on the d.c supply.
When current flows through the solenoid, a strong magnetic field is produced which magnetise the steel bar.
The pole of the magnetized steel bar is determined by Right Hand Grip Rule.
Method of magnetisation: Electrical Method using a direct current
Note:
Solenoid is made up of several hundred turns of copper wire.
Electrical method is the most effective method of magnetization. It is much quicker than stroking method and produces strong magnets
Explanation:
Answer:
Explanation:
In the process of magnetization of a bar
1). The entire bulk of the bar gets magnetised
2). Only the surface of the bar gets magnetised
3). Only the ends of the bar get magnetised
4). Only some parts of the outer layers of the bar get magnetized
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