R.h. corkscrew rule, Electrical Engineering

Assignment Help:

R.h. corkscrew rule

Note the direction of the flux is given by Maxwell's 'R.H. corkscrew rule' and that the flux lines are continuous
Applying  Ampere's  Law  to  a  concentric circular path inside the ring gives:

 


H.l=N.I

so

H=N.I/l

where l is the  length of the chosen path inside the former. (If  the   radius   of  the   former   is   large compared to the width, then l =2 .pi .r )

 

 

1389_R.H. corkscrew rule.png

Where ℜ=l/µµ0 is called  the reluctance of the magnetic path It has been written in this way to show the identical form of the equation to  current flowing in the conductor ie:

 

I=V/R

where   the   current   I   flows   through   a conductor of resistance R.

Hence the name 'magnetic circuit'

Here,    
Φ is analogous to current I
N.I is analogous to V
ℜ is analogous to R
 
The analogy is so strong that the product N.I is often referred to as the 'magnetomotive force' (m.m.f) in analogy with the electro-motive force (e.m.f. or voltage) and

 

2386_R.H. corkscrew rule 1.png

 

(σ = conductivity of the material).So we may write:
 
flux Φ =  m.m.f / circuit reluctance (Analogous to:  I = voltage/resistance in an electrical circuit).

Hence the flux flows more 'easily' through  a material with high µ material - i.e. it requires less m.m.f to produce a given flux in the material, just as current flows more easily through a high conductivity material. If an air gap were now introduced into the core,

 

2090_R.H. corkscrew rule 2.png


Related Discussions:- R.h. corkscrew rule

Determine the rated stator current, A three-phase, wye-connected, 2300-V, f...

A three-phase, wye-connected, 2300-V, four pole, 1000-kVA, 60-Hz synchronous machine has a synchronous reactanceXs = 5, a field resistance Rf = 10, and an approximately linear ma

What is a control word, What is a control word? It is a word kept in a ...

What is a control word? It is a word kept in a register (control register) used to control the operation of a program digital device.

Explain input characteristic of common emitter configuration, Q. Explain Th...

Q. Explain The Input Characteristics Of Common Emitter Configuration? Input characteristics:In the figure the abscissa is the base current IB, The ordinate is the base to emitter

Analysis in equilibrium, Analysis in equilibrium : Solution of Poisson'...

Analysis in equilibrium : Solution of Poisson's Equation with suitable boundary conditions - Non-equilibrium analysis: The electron and hole densities are no longe

Fixed bias, Fixed bias (base bias): Diagram: Fixed bias (Base ...

Fixed bias (base bias): Diagram: Fixed bias (Base bias) This type of biasing is also known as  base bias . In the instance above figure, the single power source (

Induced emf, applications of dynamically induced emf

applications of dynamically induced emf

Heterodyne wave analyzer, Q.   What is a wave analyzer? Explain any one tec...

Q.   What is a wave analyzer? Explain any one technique of wave analyzer giving its application also. OR Write short note on HETERODYNE Wave analyzer. OR Explai

Insulators, various types of electrical insulators used in electrical engin...

various types of electrical insulators used in electrical engineering

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