electric potential

numbb

"A positive point charge, when subjected to electric force only, tends to move from a region of higher potential towards a region of lower potential while a negative charge moves in the opposite way."
I don't understand this statement. Can someone explain it to me?

K^2

Picture potential as a hill. Put a marble somewhere. It rolls downhill. That's basically how this tells you the positive charge will behave. Negative charge will move in the opposite direction.

numbb

but why would negative charge move in the opposite direction??

jtbell

For a given electric field (and potential), the electric force is in opposite directions on positive and negative charges.