[问答题]
Two positive charges 2Q and Q are located as shown i
ts41 ph k w1 -or dqatd4:i/b*q2b0-dk-u krtdn t
a- rl9001nsiz* 8pn lq9pplfqhe diagram. Some of the electric field lines due to the charges are shown on the diagram. Points P and S ar
pln i8qqp1z l*s90f 0n9- lprae two points as located on the diagram.
1.Define the term electric potential.
2.Sketch the equipotential line that passes through point P.
3.A positive charge is moved from point P to point S. State and explain how the electric potential energy changes due to this move.