Question 1: Define static electricity and explain how charge flow occurs between objects.

Answer: Static electricity is the build-up of electric charge on the surface of objects, which occurs when electrons are transferred between objects. Charge flow occurs when there is a difference in electric potential, causing electrons to move from one object to another.

Question 2: Describe the mechanism of charge transfer in a Van de Graaff generator.

Answer: In a Van de Graaff generator, a belt transfers charge from a grounded comb to a metal dome, causing charge to accumulate on the dome's surface through conduction, resulting in a high static charge.

Question 3: What materials are good conductors for charge flow? Name at least two.

Answer: Copper and aluminum are good conductors for charge flow.

Question 4: Multiple Choice: Which of the following materials is an insulator?

Answer: Rubber

Question 5: Fill in the blank: When two objects are rubbed together and electrons are transferred, this process is called ________.

Answer: triboelectric charging

Question 6: Explain why clothes made of wool tend to accumulate static electricity more than clothes made of cotton.

Answer: Wool fibers are more likely to gain or lose electrons through friction because of their triboelectric properties, leading to a buildup of static charge. Cotton fibers are less prone to charge accumulation because they are less triboelectric.

Question 7: Calculations: If a charge of 5 microcoulombs (μC) flows through a conductor in 2 seconds, what is the current? (Use the formula I = Q / t)

Answer: I = 2.5 microamperes (μA)

Question 8: Which of the following best explains the role of humidity in charge flow?

Answer: Decreases charge transfer

Question 9: Identify the variable that affects the amount of static electricity produced when rubbing a balloon on hair.

Answer: Type of material

Question 10: Describe one safety precaution to consider when working with high static charges in scientific experiments.

Answer: Ensure proper grounding of equipment to prevent static shocks and accidental discharge.