Electric field lines for opposite charges

Steps:

• Identify charges: equal magnitude, one positive (+q) and one negative (-q).
• Recall electric field direction: points away from positive and toward negative charges.
• Determine pattern between charges: field lines originate at +q and terminate at -q, curving inward.
• Select diagram: choose the one showing lines flowing from +q to -q without looping or uniformity.

Why D is correct:

• D depicts field lines starting at the positive charge and ending at the negative charge, following the rule that electric field vectors point from positive to negative potential.

Why the others are wrong:

• A shows uniform parallel lines, representing a constant field like between capacitor plates, not point charges.
• B shows diverging lines from both, mimicking two positive charges.
• C shows converging lines to both, mimicking two negative charges.

Final answer: D