What term defines the movement of electrons in a circuit?

What term defines the movement of electrons in a circuit?

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

Answer: (B)

The movement of electrons in a circuit is described by current. Current is the rate at which electric charge flows past a point, so when electrons move through a wire, that flow constitutes current. It’s measured in amperes (coulombs per second). In circuit conventions we often talk about conventional current as the flow of positive charge from higher to lower potential, even though the actual electrons move from negative to positive, i.e., opposite to that direction. Voltage, the driving push, provides the potential difference that causes charges to move; resistance is what opposes that movement; and capacitance relates to a component’s ability to store charge and affect transient responses. Ohm’s law ties these together: current equals voltage divided by resistance.

The movement of electrons in a circuit is described by current. Current is the rate at which electric charge flows past a point, so when electrons move through a wire, that flow constitutes current. It’s measured in amperes (coulombs per second). In circuit conventions we often talk about conventional current as the flow of positive charge from higher to lower potential, even though the actual electrons move from negative to positive, i.e., opposite to that direction.

Voltage, the driving push, provides the potential difference that causes charges to move; resistance is what opposes that movement; and capacitance relates to a component’s ability to store charge and affect transient responses. Ohm’s law ties these together: current equals voltage divided by resistance.