Home » Ask & Discuss » Physics. » Electricity « Back to Discussion

Electricity

Blazing goIITian

Joined:	4 Dec 2008
Post:	304

24 Jun 2010 12:37:59 IST

0 People liked this

967

A hemispherical surface of radius r is placed in a uniform electric field E in such a manner that f

None

A hemispherical surface of radius r is placed in a uniform electric field E in such a manner that field is directed perpendicular to the circular plane face of the hemisphere .electric flux through the said serface is A)pie (Rsquare)E b)4pie (rsquare)E c)2pie (rsquare)E d)2pieRE

Share this article on:

Comments (6)

guru govind

Cool goIITian

Joined: 3 Apr 2010

Posts: 81

24 Jun 2010 15:22:40 IST

Like 0 people liked this

flux=AE

the surface area of hemispehere 2piR^2

flux=2piR^2E

ans is C

don't forget to rate me

vijay kharya

Blazing goIITian

Joined: 27 Aug 2009

Posts: 634

24 Jun 2010 15:41:14 IST

Like 0 people liked this

wrong, ans is A

Chanchal

Blazing goIITian

Joined: 4 Dec 2008

Posts: 304

24 Jun 2010 23:50:37 IST

Like 0 people liked this

WHY is a ? Explain

silent killer

Blazing goIITian

Joined: 15 Nov 2009

Posts: 564

25 Jun 2010 08:49:04 IST

Like 1 people liked this

ans:A

ajay singh rathore

Hot goIITian

Joined: 17 Jun 2009

Posts: 148

25 Jun 2010 09:47:07 IST

Like 0 people liked this

flux entering = flux going out

so as we close the hemisphere the area becomes pie r^2

because flux is defined only for closed surface

ajay5889.blogspot.com

ankit mishra

New kid on the Block

Joined: 26 Jan 2009

Posts: 9

25 Jun 2010 14:26:32 IST

Like 0 people liked this

ans is a

coz flux=E.dS = E.s.cos(theta)

area vector is perpendicular to the surface ,angle between s and E=0 deg

so flux= E.s.(1)

=E.pie R^2

thru the surface u have asked.....

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