what procedure will you follow to study magnetic field
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iron nail is called with wire and attached to the battery if the temporary magnet is moved in an iron nail, it is called Electromagnet. remember that when magnet material is brought near the bar magnet and it got attached to towards the magnet .remember if it is a non magnetic material it will be not attached not a bar magnet is a permanent magnet
iron nail will function as a temporary magnet .magnetic fields process by the bar magnet and electromagnet .
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about magnetic field many things we have to study like electro magnetic induction. repulsion and attraction
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