Mention any two daily life situation for the electro magentic induction which is formed by movement of bar magnet in the soleniod
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Activity 1
Take a straight thick copper wire and place it between the points X and Y in an electric circuit, as shown in Fig. 1.
Place a small compass near to this copper wire. See the position of its needle.
Pass the current through the circuit by inserting the key into the plug.
Observe the change in the position of the compass needle.

Fig. 1 Compass needle is deflected on passing an electric current through a metallic conductor
We see that the needle is deflected. What does it mean? It means that the electric current through the copper wire has produced a magnetic effect. Thus we can say that electricity and magnetism are linked to each other. Then, what about the reverse possibility of an electric effect of moving magnets? In this Chapter we will study magnetic fields and such electromagnetic effects. We shall also study about electromagnets and electric motors which involve the magnetic effect of electric current, and electric generators which involve the electric effect of moving magnets.
Take a straight thick copper wire and place it between the points X and Y in an electric circuit, as shown in Fig. 1.
Place a small compass near to this copper wire. See the position of its needle.
Pass the current through the circuit by inserting the key into the plug.
Observe the change in the position of the compass needle.

Fig. 1 Compass needle is deflected on passing an electric current through a metallic conductor
We see that the needle is deflected. What does it mean? It means that the electric current through the copper wire has produced a magnetic effect. Thus we can say that electricity and magnetism are linked to each other. Then, what about the reverse possibility of an electric effect of moving magnets? In this Chapter we will study magnetic fields and such electromagnetic effects. We shall also study about electromagnets and electric motors which involve the magnetic effect of electric current, and electric generators which involve the electric effect of moving magnets.
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