I have 2 spheres.
Little sphere with radius r
Big sphere with radius R
We know E at the large sphere.
Find the charge density.
Allow me to draw it.....
Oh...and they're connected by a long thin wire.

Question

I have 2 spheres. 
Little sphere with radius r
Big sphere with radius R
We know E at the large sphere.
Find the charge density.
Allow me to draw it.....
Oh...and they're connected by a long thin wire.

anonymous · Answer

|dw:1361480351472:dw|

anonymous · Answer

I know at this point that V_1 is different from V_2

experimentx · Answer

why??

anonymous · Answer

THe potentials are possibly different....or no? Well they didn't mention that. It must be the same since they're attached by a long thin wire

anonymous · Answer

so $$\Delta V=0$$

anonymous · Answer

Let's talk about the electric potential for a moment...

experimentx · Answer

since they are connected with wire ,,, they are at same potential. If they are not at same potential ... charges will flow to make at same potential.

anonymous · Answer

I still have a hard time picturing electric potential .....

anonymous · Answer

I can manipulate the equation relating potential to electric field and so on, but I don't quite understand it. 
How and why does a sphere have electric potential?

experimentx · Answer

think of two spheres as two vessels ..|dw:1361481079204:dw|
charges as water ... and wire as tunnel