Teacher has wound a long insulated piece of wire around an iron nail in the form of a coil. Free ends of the wire are connected to a cell through a switch as shown in the Figure 14.3. The current is switched on and some pins are placed near the ends of the nail. What is the effect of current you observe in the above activity? Will the nail attract the safety pin kept near it? What is the iron nail made of soft iron called when wire is wounded around it and current is passed through it?
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we will observe magnetic effect of electric current .
the pins will be attracted by nail.
this apparatus is called electromagnet ...
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