In a magnetic crane , a powerful electromagnet is used to lift up the iron material . But when we pass a current through a conductor & bring iron filings near it , they are set in a form of concentric circles , instead of clinging to the conductor . Why ?
In a magnetic crane , a powerful electromagnet is used to lift up the iron material . But when we pass a current through a conductor & bring iron filings near it , they are set in a concentric manner , instead of clinging the conductor . Why ?