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Download 12.2 Current can produce magnetism
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Transcript
• • Right hand rule: -place thumb in direction of current -fingers will wrap in the direction of the magnetic field Right hand grip rule: -place fingers in direction of current -thumb will point at the north pole Strength of electromagnet depends on: • Number of turns • Voltage • Length of electromagnet • Type of core Attraction and Repulsion - The electromagnets rotating in the center of this electric motor are always changing their poles from north to south - The poles are attracted or repelled by the permanent magnets on the side - It is the job of the commutator to change the poles of the electromagnets
