HOMEWORK-CH 22

# HOMEWORK-CH 22 - HOMEWORK ASSIGNMENT 1 12 The fact that the...

This preview shows pages 1–2. Sign up to view the full content.

HOMEWORK ASSIGNMENT 1 12. The fact that the spheres are identical allows us to conclude that when two spheres are in contact, charge is redistributed so that they possess equal charges. Therefore, when a charged sphere ( q ) touches an uncharged one, they will (fairly quickly) each attain half that charge ( q /2). We start in Fig. 22-20 a with spheres A and B each having charge q and experiencing a mutual repulsive force 2 2 1 / . A B F kq r = When the neutral sphere C touches sphere A in Fig. 22-20 b , sphere A’s charge decreases to q /2. Then sphere C (now carrying charge q /2) is brought into contact with sphere B in Fig. 22-20 c . Their total charge of q /2 + q becomes shared equally between them. Therefore, the charge of sphere B is 3 q /4 in the final situation. The repulsive force between spheres A and B is finally ( 29 ( 29 3 2 2 4 2 1 2 2 3 3 . 8 8 q q A B A B q F k k F r r = = = 36. Consider the charges on the x axis. The +4 e charge at a distance 2 d exerts exactly the

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

### Page1 / 2

HOMEWORK-CH 22 - HOMEWORK ASSIGNMENT 1 12 The fact that the...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online