What describes the flow of electric charge in a circuit?

• A. Voltage
• B. Current
• C. Resistance
• D. Power

Answer: (B)

The correct answer is current, which is defined as the flow of electric charge in a circuit. In electrical circuits, current represents the movement of electrons through a conductive material, typically measured in amperes (A). The amount of current flowing in a circuit depends on the voltage supplied and the resistance encountered.

Voltage, often mistaken for current, actually refers to the electrical potential difference that drives the current through the circuit. Resistance is the opposition to the flow of current and affects how much current will flow for a given voltage. Power encompasses the rate at which electrical energy is transferred or converted, which can be influenced by both current and voltage. Thus, while all these terms are interrelated in the context of electrical circuits, current specifically describes the actual flow of electric charge.