Which of the following describes static electricity?

• A. Electrons in constant motion
• B. Electricity at rest
• C. Controlled flow of current
• D. Volatile electrical discharge

Answer: (B)

Static electricity is defined as electricity that is at rest, which means it is not in motion. This type of electrical charge is typically the result of an imbalance between positive and negative charges within or on the surface of a material. This occurs often through processes such as friction, where electrons are transferred from one object to another, creating a stationary charge.

For example, when you rub a balloon against your hair, electrons transfer from your hair to the balloon, resulting in static electricity. This charge remains until it either discharges, such as through a spark, or is neutralized by contact with another surface that absorbs or redistributes the charges.

The other choices describe different electrical phenomena. For instance, electrons in constant motion pertain to current electricity where charges flow through a conductor. A controlled flow of current references a well-regulated and sustained movement of electrical current, typically in a circuit with specific characteristics. Volatile electrical discharge refers to sudden and uncontrolled releases of electrical energy, such as lightning or static shock, but does not align with the defining characteristic of static electricity being at rest.