different between bar magnet and Electromagnet class 7
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An electromagnet is made up of coiled wire, It acts as a magnet when electricity is passed through.
While Bar magnet not require wire or electricity.
Electromagnet is wrapped around a core of ferromagnetic material like steel.
Bar magnet not require these.
While Bar magnet not require wire or electricity.
Electromagnet is wrapped around a core of ferromagnetic material like steel.
Bar magnet not require these.
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BAR MAGNET---->
1) It is permanent magnet.
2) Its polarity is fixed. That means it can't change its N-pole and S-pole. It is fixed.
3) Its magnetic property cannot be increased.
ELECTROMAGNET ------>
1) It is temporary magnet. It acts as magnet till the current flows.
2) Its polarity can be changed.That means if we reverse the direction of current then its N-pole can become S-pole and vice versa
3) Its magnetic property can be increased by increasing current or by increasing the number of coils.
1) It is permanent magnet.
2) Its polarity is fixed. That means it can't change its N-pole and S-pole. It is fixed.
3) Its magnetic property cannot be increased.
ELECTROMAGNET ------>
1) It is temporary magnet. It acts as magnet till the current flows.
2) Its polarity can be changed.That means if we reverse the direction of current then its N-pole can become S-pole and vice versa
3) Its magnetic property can be increased by increasing current or by increasing the number of coils.
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