What is Electric Current? | SI Unit of Electric Current, Types of Electric Current

What is an Electric Current?

This tutorial discussed what is Current, types of electric current, and SI unit of electric current. Electricity is the flow of electrons through a material, such as a metal or a wire, in a certain direction. Current is the direction of flow of a single electron, or a group of electrons, through a material. The direction of current is usually referred to as the direction of the flow of electrons. Electricity is often described as the flow of a single electron, or a group of electrons, in a certain direction.

electric current


An electric current is a flow of electric charge. In electric circuits, this charge is often carried by moving electrons in a wire. It can also be carried by ions in an electrolyte, or by both ions and electrons such as in an ionized gas.

The SI unit for measuring an electric current is the ampere, which is the flow of electric charge across a surface at the rate of one coulomb per second. Electric current is measured using a device called an ammeter.

Electric currents cause Joule heating, which creates light in incandescent light bulbs. They also create magnetic fields, which are used in motors, inductors, and generators.

The moving charged particles in an electric current are called charge carriers. In metals, one or more electrons from each atom are loosely bound to the atom and can move freely about within the metal. These conduction electrons are the charge carriers in metal conductors.

SI Unit of Electric Current

when we talk about electricity, we often refer to the voltage and current. Current is the number of electrons flowing through a circuit and is measured in amperes (or amps). The unit of measurement for current is the ampere, which is abbreviated as A. The ampere is named after the French physicist André-Marie Ampère, who discovered the phenomenon of electric currents in the early 19th century. The electric current is measured in amperes and is the measure of the flow of electrons in a circuit.

SI unit of the electric current is the Ampere and the symbol is A.

Electric Current Formula

Using Ohm’s law, we can represent as the formula:

The current formula is given as I = V/R. The SI unit of current is Ampere (Amp).


V –  the electric Voltage,

R – the resistance of the metallic body,

I –  the electric current.

Mathematically, this can be represented as:

I = 𝑄/𝑡


I – is the Electric Current,

Q – is the Electric Charge,

T – Time.

Types of Electric Current

There are two main types of electric current: direct current (DC) and alternating current (AC). Direct current is the flow of electrons in a wire in one direction. Alternating current is the flow of electrons in a wire in both Directions. Direct current is used in most electronic devices, including homes and offices.

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