Answer: zero.
- A zero
- B a maximum
- C infinite
- D negative
Correct answer: A. zero
Explanation: The field inside a charged hollow conductor is zero (electrostatic shielding).
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.