An electro magnet is a type of magnet in which the magnetic field is redused by the flow of the electric current.
1. Number of turns in the coil
2. The strength of the current
3. The nature of core material.
The piece of soft iron nail is placed inside a circular coil. Here, soft iron nail is called core. When current is passed through the coil, the soft iron filings are brought near the soft iron nail, then the iron filling cling to the nail. On the other hand, the soft iron nail is demagnetised, when the current is stopped in the coil. This arrangement is called an electromagnet. The electromagnet is thus a temporary magnet. The strength of electromagnet will depend on,
1. Number of turns in the coil
2. The strength of the current
3. The nature of core material.
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