Triboelectric Effect from Air Friction

Steps:

• Identify the phenomenon: Aircraft charging occurs due to electron transfer during contact.
• Consider motion: Flying involves constant rubbing against air molecules.
• Evaluate options: Friction generates charge via triboelectric effect, unlike radiation or waves.
• Confirm: This matches real-world observations of aircraft static buildup.

Why B is correct:

• Friction with air causes triboelectric charging, where dissimilar materials exchange electrons, building static electricity as defined in electrostatics.

Why the others are wrong:

• A: Background radiation ionizes air but doesn't directly charge the aircraft structure.
• C: Heat waves transfer thermal energy, not electrical charge.
• D: Radio waves propagate electromagnetic signals without inducing net charge on the aircraft.

Final answer: B