Answer: 9.0 × 105 N m2/C.
- A 4.5 × 105 N m2/C
- B 8.0 × 105 N m2/C
- C 1.8 × 106 N m2/C
- D 9.0 × 105 N m2/C
Correct answer: D. 9.0 × 105 N m2/C
Explanation: By Gauss law the flux depends only on the enclosed charge: Φ = q/ε0 = 8 × 10-6/8.85 × 10-12 ≈ 9.0 × 105 N m2/C, independent of the surface shape or size.
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.