Hello! Okay so I understand that electric potential: V = kQ/r ...must be influenced by the radius doubling because it would make the potential energy half of what it originally was because of the proportionality law, v is proportional to 1/r. With electric fields though, how can there possibly be no change? The formula is E = kQ/r^2 ...meaning if should be influenced as well? The answer is c, btw.