What is Current

Horace He

Last Updated: August 7, 2023

What is Current

Current is the flow of electric charge through a conductor. It is a measure of the rate at which charge moves and is typically expressed in units of amperes (A). Current is generated by a difference in potential, or voltage, which provides the driving force for the movement of electrons.

Current can be visualized using the example of a long tube filled with balls. When a ball is pushed at one end of the tube, the ball at the other end is pushed almost instantly, even though none of the balls move significantly. This represents the flow of charge in a circuit, where the movement of one electron causes a chain reaction, resulting in the propagation of charge throughout the circuit.

Frequently Asked Questions

Does More Current Mean a Brighter Bulb

No, the brightness of a lightbulb is determined by its power, which is calculated using the formula P = I2R. Therefore, the brightness of a bulb is influenced by both the current and the resistance.

What Is Difference Between Voltage and Current

Voltage, also known as electromotive force, refers to the energy per unit charge. In simpler terms, voltage represents the disparity in electric potential between two specific points. On the other hand, current denotes the rate at which electric charge flows.