Question 5 of 10

A student draws the field-line pattern for a pair of point charges and writes four rules beside it. Which of the rules are correct?

• I. Two field lines can never cross each other.
• II. Electrostatic field lines can form closed loops.
• III. Field lines start on positive charges and end on negative charges, or go to or come from infinity.
• IV. Where field lines are farther apart, the field is stronger.