Electric current is the flow of electric charge through a conductor, such as a wire. It is the rate at which electric charge flows through a circuit or a point in a circuit. Electric current is measured in amperes (A) and is represented by the symbol “I”.
Electric current is caused by the movement of electric charges, which can be either negative electrons or positive ions. Electric current flows from the positive terminal of a battery or power source to the negative terminal, completing a circuit.
In an AC (alternating current) circuit, the direction of current flow changes periodically, while in a DC (direct current) circuit, the direction of current flow is constant.
The amount of electric current in a circuit depends on the voltage of the power source and the resistance of the circuit.
Ohm’s law states that the current in a circuit is directly proportional to the voltage and inversely proportional to the resistance.
Electric current has many practical applications, such as powering electrical devices and transmitting information through electrical signals. However, electric current can also be dangerous if not handled properly, as it can cause electric shock, burns, or even death.