Home » Ask & Discuss » Physics
« Back to Discussion

Thermal Physics

Cool goIITian

Joined:	28 Jan 2012
Post:	84

22 May 2012 13:12:45 IST

0 People liked this

352

electrostatics

Engineering Entrance , Medical Entrance , NEET , JEE Main , AIIMS , JEE Main & Advanced , Physics , Thermal Physics

why does an electric field inside a dielectric decrease when it is placedin an external field?

Comments (5)

Aman Raghuvanshi

Hot goIITian

Joined: 13 Nov 2011

Posts: 157

25 May 2012 17:24:57 IST

Like 0 people liked this

This is because the dielectric reduces the nunber of electric field lines passing through it by acting as a neutral wall.

It is like the intensity of sound heard reduces if a large obstacle (or wall) is placed b/w the source and observer (the diff is that the wall reflects back sound waves but dielectric doesn't reflect or absorb the field lines).

P.S. : I am no expert but this ^ is what i conclude.

Janardhan K

Blazing goIITian

Joined: 16 May 2012

Posts: 1495

25 May 2012 17:34:16 IST

Like 0 people liked this

i think u need to renovate ur question.

Janardhan K

Blazing goIITian

Joined: 16 May 2012

Posts: 1495

25 May 2012 17:36:06 IST

Like 0 people liked this

the overall electric field decreases because of the development of opp. but parallel electric field inside the dielectric.

Aman Raghuvanshi

Hot goIITian

Joined: 13 Nov 2011

Posts: 157

26 May 2012 21:03:49 IST

Like 0 people liked this

@ Janardhan K

Please explain what you wrote...how does that happen??

Janardhan K

Blazing goIITian

Joined: 16 May 2012

Posts: 1495

27 May 2012 17:24:36 IST

Like 0 people liked this

i wrote that because in absence of external field there is no "electric field inside a dielectric".when ext. field is applied it gets polarized and then the electric field gets created "inside the dielectric".

Quick Reply

Reply

	Some HTML allowed.
	Keep your comments above the belt or risk having them deleted.
	Signup for a avatar to have your pictures show up by your comment
	If Members see a thread that violates the Posting Rules, bring it to the attention of the Moderator Team