How Does Distance Affect Electric Potential Near a Point Charge?

[joedirt]

Calculate electric potential at A, 3.0 m away from a point charge of +1.0 C

Calculate the electric potential at B, 6.0 m away from a point charge of +1.0 C

How much work would be done moving a +0.2 C charge between A and B

I'm not sure what equation/s to use?

 

[ehild]

What is the potential at distance d from a point charge?

ehild