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

Find the overall current drawn from the supply, Q. A single-phase industria...

Q. A single-phase industrial plant consists of two loads in parallel: P1 = 48kW PF1 = 0.60 lagging P2 = 24kW PF2 = 0.96 leading It is operated from a 500-V, 60-Hz source.

Features of modern ic engines, The IC engine based automobiles have been bu...

The IC engine based automobiles have been built and sold for more than 100 years. Predominantly the fuels used for running these IC engines have been petrol and diesel. In recent t

Explain cache structure in pentium, Explain cache structure in Pentium. ...

Explain cache structure in Pentium. Cache structure in Pentium: The cache in the Pentium has been changed by the one determined in the 80486 microprocessor. The Pentium has t

Calculate the new rotor current frequency, Induction motors are often brake...

Induction motors are often braked rapidly by a technique known as plugging, which is the reversal of the phase sequence of the voltage supplying the motor. Assume that a motor with

Define characteristics of discrete time systems - linear, Define Characteri...

Define Characteristics of Discrete Time Systems - Linear? A discrete-time system is said to be linear if it obeys the principles of superposition. That is, the response of a li

What is piconet, A collection of devices connected by Bluetooth technology ...

A collection of devices connected by Bluetooth technology in an ad hoc fashion.

What is meant by wait state, What is meant by Wait State? This state is...

What is meant by Wait State? This state is used by slow peripheral devices. The peripheral devices can transmitted the data to or from the microprocessor by using READY input l

Triggering capabilities of logic analyser, trigger capabilities of logic an...

trigger capabilities of logic analyser that differentiate it from other devices???

Explain acceptance cone, Explain Acceptance cone? The fibre air - core ...

Explain Acceptance cone? The fibre air - core interface is display below: In this figure Omax is the maximum angle, inside that the rays undergo total internal reflecti

Find resistance when the bridge is balanced, Q. Consider the bridge circuit...

Q. Consider the bridge circuit given in Figure with R 1 = 24 k, R 2 = 48 k, and R 3 = 10 k. Find R when the bridge is balanced with V = 0.

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