Stationary charged object produces electric and gravitational fields

Steps:

• All objects with mass produce a gravitational field due to Newton's law of universal gravitation.
• An electrically charged object produces an electric field, as described by Coulomb's law.
• Magnetic fields arise from moving charges or currents; a stationary object produces none.
• The plastic ball is at rest and charged, so it generates only electric and gravitational fields.

Why B is correct:

• A stationary charged mass creates electric fields from charge separation (Coulomb's law) and gravitational fields from its mass (Newton's gravitation law), with no magnetic field due to lack of motion.

Why the others are wrong:

• A includes magnetic, but stationary charges do not produce magnetic fields (Ampere's law requires current).
• C omits gravitational, yet all masses produce gravitational fields regardless of charge.
• D omits electric, but the charged ball must produce an electric field by definition.

Final answer: B