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Friday, 25 October 2013

Magnetism And Electromagnetism - Methods of Making Magnets

Points : Methods of Making Magnets, Single Touch Method, Electrical Method Methods of Making Magnets A substance can be magnetizing by following methods.
• Single Touch Method.
• Electrical Method.
1. Single touch method: In this method a hard steel bar is rubbed with one end of an inclined magnet in the direction from south to north. On reaching the end ‘N’, the magnet is lifted and the same end is brought back to the end ‘S’ of the bar.
2. Electrical method: If we take a U shape steel bar and wound its arm by insulated copper wire in opposite direction and passing current through the wire by connecting it with a battery for few minutes then the bar will become a magnet. A bar of steel can also be magnetized by this method.

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