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

Magnetism

Scorching goIITian

Joined:	25 Feb 2007
Post:	225

15 Dec 2007 16:01:25 IST

0 People liked this

550

rewards for the brave!!!!!!20 nickels for sure!!!

None

A circular ring of wire is placed in a time varying magnetic field B=B₀t,where B means magnetic field and t means time.It's radius is R.At a distance of 1.732R from the centre a metallic rod of length 2R is fixed about it's end and it can rotate with angular speed

.find the emf induced in the rod when it touches the near end of the ring???

note::the magnetic field is only in the region bounded by the ring and nowhere else outside.

Share this article on:

Comments (5)

avdesh100

Blazing goIITian

Joined: 9 Feb 2007

Posts: 471

17 Dec 2007 10:47:49 IST

Like 0 people liked this

is it zero as i think induced electric field willl be perpendicular to each element of rod.....so induced emf will be zero....
not sure though!

bumba

Scorching goIITian

Joined: 25 Feb 2007

Posts: 225

17 Dec 2007 14:04:25 IST

Like 0 people liked this

sorry avdesh100,it is not the answer.

Bhupesh Mohanty

Moderator

Joined: 29 Dec 2006

Posts: 1037

20 Dec 2007 23:51:02 IST

Like 0 people liked this

.find the emf induced in the rod when it touches the near end of the ring???

note::the magnetic field is only in the region bounded by the ring and nowhere else outside.

Could you please clear if the rod is rotating and if possible show your question on a diagram . That would make us clear what exactly the question is asking A time varying magnetic field only produces circular electric field and the other end of the rod is out side the ring, If its rotating ( which is not mentioned in the question , It says it can ), I didn't see any reason why the ring should be there and you said the magnetic field is bounded to the circular reason only . Make your question Explicit or let me know the source you will get the complete solution .

avdesh100

Blazing goIITian

Joined: 9 Feb 2007

Posts: 471

21 Dec 2007 16:40:19 IST

Like 0 people liked this

source ...its dc pandey i crossed checked it.....anyways if its challenge then its not worth it if its a dooubt then lemme knw ill post the solution

i dont want rates!:)

bumba

Scorching goIITian

Joined: 25 Feb 2007

Posts: 225

29 Dec 2007 22:55:09 IST

Like 0 people liked this

sorry,to say but it's not of that book.
So,u think that u have got the answer then please put it here.
mind my words it is indeed a CHALLENGING question.

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