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Question
_____ a bar magnet over a surface of a piece of iron bar converts it to a magnet.
_____ a bar magnet over a surface of a piece of iron bar converts it to a magnet.
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Solution
The correct option is C Rubbing
Magnetism is achieved by rubbing action between iron bar and magnet. One pole of bar magnet is rubbed from one end to another end of iron bar. After repeating this process for few times the iron bar converts into a magnet.
Magnetism is achieved by rubbing action between iron bar and magnet. One pole of bar magnet is rubbed from one end to another end of iron bar. After repeating this process for few times the iron bar converts into a magnet.
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