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Give an illustration of determining dire...

Give an illustration of determining direction of induced current by using Lenz's law.

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Let us move a bar magnet towards the solenoid, with its north pole pointing the solenoid.

This motion of the magnet increase the magnetic flux of the coil which in turn, induces an electric current. Due to the flow of induced current, the coil becomes a magnetic dipole whose two magnetic poles are on either end of the coil.
In this case, the cause producing the induced current is the movenement of the magnet. According to Len.z law, the induced current should flow in such a way that it opposes the movement of the north pole towards coil. It is possible if the end nearer to the magnet becomes noth pole.

Then it repels the north pole of the bar magnet and opposes the movement of the magnet. Once pole ends are known, the direction of the induced current could be found by using right hand thumb rule.
When the bar magnet is withdrawn, the nearer end becomes south pole which attracts north pole of the bar magnet, opposing the receding motion of the magnet.

Thus the direction of the induced current can be found from Lenz.s law.
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