Producing electricity by ____ is an example of static charge.

• A. Conduction
• B. Induction
• C. Friction
• D. Charge

Answer: (C)

Friction creates static electricity through the triboelectric effect: when two materials rub together, electrons transfer from one to the other because each material has a different tendency to hold onto electrons. When the objects are separated, the transferred electrons leave one surface negatively charged and the other positively charged. This buildup of stationary charge is what we call a static charge, and it’s not a continuous current flowing—it's a charge that stays in place until it’s discharged.

Charging by contact (conduction) involves electrons moving between objects that touch until they share the same potential, and charging without contact (induction) rearranges charges using a nearby charged object. The word “charge” by itself isn’t a specific method.