![]() An uniform magnetic force field is produced between poles. (i) Field magnet :There are two pole piece of a strong magnet face to face. The transformation of mechanical energy to electrical energy takes place in the form of a.c.Ĭonstruction :The apparatus has been shown in fig. It is mainly based on the principle of electromagnetic induction. ![]() generator or dynamo : It is an electric instrument which converts mechanical energy into electrical energy. hence we find that Lenz’s law is in accordance with law of conservation of energy. This work is transformed in electrical energy. On the other hand, when magnet is taken away the attraction is experienced because current is reversed. ![]() This workdone for opposition is stored in coil in form of electromagnetic potential energy. So work is to be done against this opposition. When magnet is brought near the coil, current produced in coil always opposes the motion of magnet. ![]() There is transformation of other form of energy into electrical energy.īy experiment it is found that the direction of current always opposes the moving magnet or primary coil. Now question arises from where energy comes. We see that in electromagnetic induction there is flow of current even in the abxence of cell or battery. Ans ⇒ (a) Lenz’s law :According to this law in the phenomenon of electromagnetic induction the direction of induced current is such that it opposes the cause by which it is produced.
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