Answer: vector.
- A vector
- B scalar
- C dimensionless
- D unitless
Correct answer: A. vector
Explanation: Electric field has both magnitude and direction, so it is a vector.
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.