LENZ LAW:


This law is also one of the Faraday's Laws and this law states that "oppose cause to it" . This law also reflects the law of "conservation of energy" . In detail it will be available below.

                       


The above figure shows the conductor loop i.e, upper part of the conductor and a magnet with north and south are shown in the three dimensional axis x , y , z.

When the magnet push near to the conductor loop the flux of magnet passes through the conductor loop and while pushing the magnet nearer to the conductor there is a change in magnetic field through the conductor loop i.e, magnetic field increases gradually in the conductor that means changing of flux occurs in the conductor.

So that according to Faraday's Laws of Electro Magnetic Induction whenever flux changes in a conductor emf will be induced.

As the emf induced there will be a flow of current through the conductor loop. Depending on the direction of flow of current the magnetic field choosen north or south.( By right hand thumb rule)

In our case when we push magnet nearer To the conductor loop the induced current will flow outside the conductor loop. So that the conductor will exhibits the behaviour of North pole which opposes the moment of magnet towards conductor.

i.e, By force of repulsion  opposes the north pole of magnet hence pushing force that is moment towards the conductor loop.

So that we can conclude that magnetic field of conductor opposes cause producing it. By this we can conclude that Lenz law .

In the next article we will see how law of conservation of energy related to Lenz law.

                    e = - N d( flux)/dt ---------(1)

from above equation the negative sign (-) indicates the Lenz Law. Opposite of the voltage applied. Oppose cause producing it.