Feynman's apparent paradox - Electromagnetism

[Shan Ravi]

Feynman's "apparent" paradox - Electromagnetism

This is the paradox discussed in chapter 17 of "Feynman Lectures on Physics - Vol II"

http://www.flickr.com/photos/37453425@N07/3447068420/

Say suppose the battery drains out or somehow you stop the current outta the battery. By electromagnetic laws, the disc ought to rotate... but then that violates the law of conservation of angular momentum (since no external torque is being applied)

I suggest you read the "apparent" paradox in the book.

 

[Shan Ravi]

http://www.flickr.com/photos/37453425@N07/3447068420/

This is the image... no clue why isn't it being displayed..

 

[dx]

No paradox, the electromagnetic field can have angular momentum.

 

[Shan Ravi]

Ooh... thnx :)