Answer: Positive charges.
- A Negative charges
- B Positive charges
- C Neutral objects
- D Both positive and negative
Correct answer: B. Positive charges
Explanation: Electric field lines begin at positive charges and end at negative charges.
Field lines always point from positive to negative charge, are denser where the field is stronger, and never cross; an isolated positive charge has lines radiating symmetrically outward, while a dipole's lines curve from the positive to the negative charge.
Concept context
Coulomb's law, electric field, potential, capacitors, Gauss's law.