Electric Forces

[kingwinner]

1) Two charged spheres, 10.0 cm apart, attract each other with a force of magnitude 3.0x10^-6 N. What force results if an uncharged, identical sphere is touched to one of the spheres and is then taken far away?

 

2) What is static electricity? Why and in what way is static electricity "static"? Must electrostatic forces be repulsive? Can electrostatic forces ever be attractive?

 

Thanks for replying!

[Roadam]

1. The sphere you touch has then only half the charge and so the repulsive force is one for quarter smaller.

2. Thats the think we just been doing. Forces beetwen static charges. And of course charges are positive and negative, + and + hate each other, + and - cant be apart.

[kingwinner]

Hi,

 

1) How do you know that exactly half of the charge is removed? How can this be justified mathematically?

[IDMclean]

Static Equilibrium.

 

The rate of exchange will be such that

[math] q_{end} =\frac {q_1 + q_2 + q_3 + q_n...} {n}[/math]

 

I think, though I not be sure.

[Farsight]

Have a read of this here What is Electricity kingwinner. I can't vouch for its scientific correctness, but it's interesting:

 

http://amasci.com/miscon/whatis.html

[IDMclean]

Popular, I love you like another brother from a different mother.