P22_004 - sphere 1s charge decreases to q/ 2. Then sphere 3...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
4. The fact that the spheres are identical allows us to conclude that when two spheres are in contact, they share equal charge. Therefore, when a charged sphere ( q ) touches an uncharged one, they will (fairly quickly) each attain half that charge ( q/ 2). We start with spheres 1 and 2 each having charge q and experiencing a mutual repulsive force F = kq 2 /r 2 . When the neutral sphere 3 touches sphere 1,
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: sphere 1s charge decreases to q/ 2. Then sphere 3 (now carrying charge q/ 2) is brought into contact with sphere 2, a total amount of q/ 2 + q becomes shared equally between them. Therefore, the charge of sphere 3 is 3 q/ 4 in the Fnal situation. The repulsive force between spheres 1 and 2 is Fnally F = k ( q 2 ) ( 3 q 4 ) r 2 = 3 8 k q 2 r 2 = 3 8 F ....
View Full Document

This note was uploaded on 11/12/2011 for the course PHYS 2001 taught by Professor Sprunger during the Fall '08 term at LSU.

Ask a homework question - tutors are online