What is Electromagnetism

Posted by Electromagnetism | 7:40 AM | | 56 comments »

When current passes through a conductor, magnetic field will be generated around the conductor and the conductor become a magnet. This phenomenon is called electromagnetism. Since the magnet is produced electric current, it is called the electromagnet.

An electromagnet is a type of magnet in which the magnetic field is produced by a flow of electric current. The magnetic field disappears when the current ceases.

In short, when current flow through a conductor, magnetic field will be generated. When the current ceases, the magnetic field disappear.

Physics Animation
Applet
Magnetic Field of a Magnetic Bar- Walter Fendt
Magnetic Field Line - Molecular Expression
Attraction and Repulsion by Magnet Pole

Exercise
1. Which of the following materials is most likely to be used as the coil of an electromagnet?


A. Copper
B. Steel
C. Iron
D. Silver


2. Which of the following materials is most likely to be used as the core of an electromagnet?

A. Copper
B. Steel
C. Iron
D. Silver


3. An electromagnet is a type of magnet in which the magnetic field is produced by a flow of electric current. The magnetic field disappears when the current ceases.

True
False


Youtube Video

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