Practice question

**Fundamental property of charge** includes additivity and quantization, meaning net charge equals algebraic sum of constituents and each is multiple of e. When rod loses charge, electron removal is inferred, and n = q/e gives transferred count. Negative charges attract positive test charges, so field lines, representing the force direction on a positive charge, point inward toward the negative charge. This attraction defines their termination, unlike positive charges where lines extend outward. Substituting values gives Attraction, which matches expected magnitude for this electrostatic configuration, confirming Coulomb's and Gauss's principles and charge quantization consistency.