Explain the lenz law, Physics

Assignment Help:

Explain the Lenz Law

An induced current always flows in a direction so that its electromagnetic field opposes the change in magnetic flux producing it. This is embodied in the negative sign on the right side of Faraday's Law. If this were not true, if the induced current could be in the same direction as the change in flux causing it, then we would have a system which would make the flux bigger and bigger with no end in sight - this is not likely to happen if energy is conserved.

The magnet moved into the coil, the induced current in the coil has to make the electromagnet of the coil repel the magnet being moved towards it. So, if the coil shown is wound counter- clockwise when viewed from the right side, the positive induced current would go counterclockwise in the circuit to create an electromagnet, which has a magnetic field opposite the one in the permanent magnet--so it will repel the permanent magnet.

668_Lenz’s Law.png

Try example of the magnet moved out of the coil. Which direction is the induced current in the circuit?

Answer - No peeking until you have tried on your own!  Now that you have given it a try, check your answer against this. The magnet is being pulled out of the coil so that the electromagnet caused by the induced current must be in the direction that attracts the permanent magnet. This means that the induced current must flow from the left to the right side of the solenoid, and the right hand curls from the back to the front of the solenoid to make an electromagnet with its magnetic field pointing to the right, the direction of your right thumb. The induced current flows clockwise in the circuit.


Related Discussions:- Explain the lenz law

Explain the term dielectric constant, Explain the term 'dielectric constant...

Explain the term 'dielectric constant' of a medium in terms of capacitance of a capacitor. Draw a graph showing variation of resistivity of carbon with temperature

What is harness, What is harness? The harness applied in the industry t...

What is harness? The harness applied in the industry to explain a group of fibers or light guides, particularly terminated and with a common end. Usually, each harness should h

SPECTRUM, HOW CAN A PURE SPECRUM BE PRODUCED IN THE LABOLATORY

HOW CAN A PURE SPECRUM BE PRODUCED IN THE LABOLATORY

Which one of the subsequent is true of electric potential, Question: W...

Question: Which one of the subsequent is true of electric potential but isn't true of an electric field? Answer: The electric field acquaintances a vector with empt

What is the force essential to accelerate a mass, Q. What is the force esse...

Q. What is the force essential to accelerate a mass of one kilogram one meter per second per second? Answer:- Fundamentally you have defined the Newton. Force is the ve

Corkscrew rule, Corkscrew Rule: Knowing the direction of the current, i...

Corkscrew Rule: Knowing the direction of the current, it is possible to determine the direction of the magnetic field using Maxwell's Corkscrew rule, usually abbreviated to the

What is gravity, What is Gravity Gravity is a force which holds you in ...

What is Gravity Gravity is a force which holds you in your seat. If I pull the chair out from under you, what will take place? Ouch! Gravity fast pulls you down to the floor. I

Magnitude of k.e. in an orbit, Magnitude of K.E. in an orbit is equal to: ...

Magnitude of K.E. in an orbit is equal to: (1)Half of the potential energy     (2)Twice of the potential energy       (3)One fourth of the potential energy   (4 ) None

Nuclear, how proton electron hypothesis is rejectrd on the basis of nuclear...

how proton electron hypothesis is rejectrd on the basis of nuclear magnetic dipole moment?

Mechanics, A gas is compressed from 400 cm3 to 200 cm3 at a constant pressu...

A gas is compressed from 400 cm3 to 200 cm3 at a constant pressure of 100 kPa. At the same time, 100 J of heat energy is transferred out of the gas. What is the change in internal

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd