Magnetism Electromagnetism OLevel Physics 5054 Part2 Sir Tauqeer Asif

Описание к видео Magnetism Electromagnetism OLevel Physics 5054 Part2 Sir Tauqeer Asif

How current magnetises the coil, coil operates relay.
Shows a relay connected to a cell and a switch. When switch S is closed, the iron core is magnetised. The left side of the core is an N-pole, as shown.
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