Answer: Q/epsilon 0.
- A Q/epsilon<sub>0</sub>
- B -Q/epsilon<sub>0</sub>
- C Zero
- D Depends on shape of surface
Correct answer: A. Q/epsilon<sub>0</sub>
Explanation: Gauss's law: flux = Q<sub>enclosed</sub>/epsilon<sub>0</sub>, regardless of the shape or size of the closed surface.
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.