what it electromagnet ? What decides its polarity ? how it differ from a permanent magnet ? List the three factors and explain how strength of electromagnet is....
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Answer:
an electronic magnet is a temporary magnet made by electric current
Explanation:
the correction of the current decides it's polarity
an Electromagnet is a temporary magnet whereas a permanent magnet is permanent
the strength of an Electromagnet is decided by the current as when a copper wire is rounded up on a iron piece then in the current passes to the copper wire if the current is in the direction then the direction coming will be south and the direction going will be north
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