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A Levels Physics (9702)•9702/13/M/J/19
Question 31 from 9702/13/M/J/19

Explanation

Electric field lines repel between like charges Steps:

  • Electric field lines originate from positive charges and point away from them.
  • For two positive charges, lines from each charge repel those from the other, bending outward.
  • No lines connect the charges directly; instead, they diverge symmetrically.
  • Select the diagram showing diverging, non-intersecting lines from both charges.

Why D is correct:

  • Diagram D depicts lines emanating radially from each positive charge and curving away due to mutual repulsion, consistent with Coulomb's law for like charges.

Why the others are wrong:

  • A shows lines converging between charges, indicating attraction for opposite charges.
  • B illustrates a uniform parallel field, typical of infinite plates, not point charges.
  • C displays lines looping or crossing, violating the rule that field lines do not intersect.

Final answer: D

Topic: Electric fields and field lines

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