Electric field lines for opposite charges

Steps:

• Identify the positive and negative charges: lines must originate from the positive charge.
• Trace the direction: lines point away from positive and toward negative, forming curved paths.
• Check for continuity: lines do not cross and maintain decreasing density away from charges.
• Verify no reversals: no lines start from negative or end on positive.

Why A is correct:

• Diagram A shows lines starting at the positive charge and ending at the negative, following the rule that electric field direction is from positive to negative potential.

Why the others are wrong:

• B: Lines originate from the negative charge, reversing the proper direction.
• C: Lines are straight and parallel, ignoring the radial, curved nature of point charge fields.
• D: Lines cross each other, violating the principle that field lines never intersect.

Final answer: A