Q15. Eight identical spherical raindrops are each at a potential V, relative to the potential far away. They coalesce to make one spherical raindrop whose potential is:
V = sum( Vi )
The Attempt at a Solution
OK so if you just sum the potentials you get 8V right? But the answer's D, 4v. Can someone make sense of this to me, please? I don't get what's cutting the value in half.