Register to reply 
Electric or magnetic field at point P in presence of dielectric/magnetic material. 
Share this thread: 
#1
Nov1610, 07:39 PM

P: 3,898

I want to confirm either the electric field at a point P in space in an [itex]\vec E_{ext} [/itex] field with the presence of a dielectric material is the sum of the [itex]\vec E_{ext} [/itex] and electric field [itex]\vec E_{p} [/itex] from the dielectric material due to polarization cause by the [itex]\vec E_{ext} [/itex].
And this is also true of the magnetic field at a point P in space with [itex]\vec B_{ext} [/itex] and magnetic material. Thanks 


#2
Nov1710, 01:02 AM

P: 2,258

whats your question?



#3
Nov1710, 02:22 AM

P: 3,898




#4
Nov1710, 02:29 AM

P: 2,258

Electric or magnetic field at point P in presence of dielectric/magnetic material.



#5
Nov1710, 02:36 AM

Sci Advisor
P: 3,593

Yes, yungman, that's true, at least for the electric field and/ or in magnetostatics. In full electrodynamics, there is also a contribution of the change of P to the magnetic field. In fact, in optics one sets often M=0, so that all effects of the medium are due to P alone.



#6
Nov1710, 11:30 AM

P: 3,898

Same as in the case of magnetic with a piece of magnetic material close by. 


#7
Nov1810, 11:27 AM

P: 3,898

Do you mean if P is at some conducting material where very small free current density [itex]\vec J_{free}[/itex] created by even static magnetic field. But if P is just a point in space ( empty space) there should be no more changes. 


#8
Nov1810, 10:05 PM

Sci Advisor
HW Helper
PF Gold
P: 2,007




#9
Nov1910, 01:49 AM

Sci Advisor
P: 3,593




#10
Nov1910, 11:19 AM

P: 3,898

Anyway, thanks for all the replies to confirm my understanding. Alan 


Register to reply 
Related Discussions  
Alignment of micro dipoles in magnetic material in external magnetic field.  Classical Physics  5  
Dielectric sphere in point charge electric field  Classical Physics  5  
Atomic Energy Levels in the Presence of a Magnetic Field  Advanced Physics Homework  0  
Electric field in a dielectric material  Advanced Physics Homework  3  
Induced Magnetic Field in Dielectric  Introductory Physics Homework  1 