Answer: Zero field.
- A Stronger field
- B Same field as outside
- C Zero field
- D Negative field
Correct answer: C. Zero field
Explanation: Faraday cage effect: the inside of a hollow conductor is shielded from external electric fields. E = 0 inside.
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.