Hi(adsbygoogle = window.adsbygoogle || []).push({});

This shouldn't be very difficult: I have two spheres (made of Cu -> conductors) with given radiusa(both), the distance of their centers ish. Now I know that the potential on the first sphere is zero and on the other 1000 Volts (the potential at infinity is zero).

I must determine the force that pulls the spheres together (or apart).

I think that what I must find is the charge of each of the spheres, then the force is easy via Coulomb's law. I also think that the charge on the spheres should be like:

Q = CU

where Q is vector of charges, C is 2x2 matrix of coefficients Cij and U is a vector of potentials on the spheres (0V and 1000V in this case). The Cij coefficients should be given by the geometry of the problem, but I don't know how tu determine them. But perhaps I am completely wrong.

Could anyone point me in the right direction? Thanks a lot. It's pretty urgent, btw:-)

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Two spheres with given potential, what's their charge?

Can you offer guidance or do you also need help?

Draft saved
Draft deleted

**Physics Forums | Science Articles, Homework Help, Discussion**