Your teacher has shown you the following activity. Activity: 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 Figure 14.3. The current is witched on and some pins are placed near the ends of the nail.
(i) Why does the nail attract the pins?
(ii) What will happen if we connect more cells in the circuit?
(iii) What will happen if we use some other material like a straw in place of the nail?
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Explanation:
The iron nail attracts the pins. Why?
b) What will happen if you decrease or increase the current?
c) What will happen if you connect more than two cells in the electric circuit?
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