Lenz’s law , Physics

LENZ’S LAW 

2256_lenz law.png

A change of flux in a closed circuit induces an emf and sets up a current.  The direction of this current is such that its magnetic field tends to oppose the change of flux.  See diagram below.

 

The direction of the induced emf as given by Lenz's Law may be shown in our equation by introducing a negative sign, but remember that the negative sign is vectorial and not arithmetic.

Hence, 2278_lenz law1.png

This formula is not strictly correct. A conductor must cut 108 lines of flux per second in order to induce 1 volt.  That is the flux must be changing at a rate of 108 lines per second.  The formula should therefore be written as:

2272_lenz law2.png

 

Posted Date: 9/13/2012 6:01:39 AM | Location : United States







Related Discussions:- Lenz’s law , Assignment Help, Ask Question on Lenz’s law , Get Answer, Expert's Help, Lenz’s law Discussions

Write discussion on Lenz’s law
Your posts are moderated
Related Questions
Wires A as well as wire B are both made out of copper. Both of wires have the same length. The diameter of wire B is doubles that of wire A. Answer: Resistivity is a charac

Figure shows a simple model of spring-mass system. The mass is released from the rest with the springs un-stretched. It's downward acceleration is a=9.81 - 15.24y m/s 2 where y is

What do you mean by Doppler's shift? Derive a mathematical expression for the apparent frequency heard by a moving listener when the source of sound is at rest. What is the effe

Explain Simple Pendulum Simple Pendulum : The A point mass suspended by a weight less and inextensible string to a friction less support is known as a Simple pendulum.

An inductor is generally constructed as a coil of conducting material, characteristically copper wire, wrapped around a core either of air or a ferromagnetic material. Core materia

Induced electric currents can be explained using which of the following laws? a) Gauss's Law b) Faraday's Law c) Ohm's Law d) Ampere's Law Ans: Induced e

A rectangular rosette is mounted on a test structure as shown, loads are applied, and the following strains are measured by strain gage elements 1, 2, and 3: ε 1 = 1500 μm/ m ε


Q. For projectiles fired at identical speeds but a variety of angles from the ground, neglecting air resistance also the curvature of the Earth at what angle will the maximum horiz

Explain the principle of particle detection. Draw log n -V graph showing different regions and discuss the significant physical processes taking place in these regions.