Concept Of Electric Current

A 60 watt lightbulb pulls.

Concept of electric current.

Whether it is an electrical heater a large electrical grid system a mobile phone computer remote sensor node or whatever the concept of electrical current is central to its. It is the flow of charge per unit time. Google classroom facebook twitter. The instantaneous current is given as l q t.

614 an electric current is said to exist when there is a net flow of electric charge through a region. To gain a deeper understanding of what an electric current is and how it behaves in a conductor we can use the water pipe analogy of electricity certainly there are some limitations but they serve as a very basic illustration of current and current flow. These are the three basic building blocks required to manipulate and utilize electricity. Introduction to circuits and ohm s law.

One ampere equals 3 10 9 esu per second. Commercial power lines make available about 100 amps to a typical home. Following the metaphor of water moving through a pipe this continuous uniform flow of charge through the circuit is called a current. Direction of electric current as defined above will be taken along the direction of flow of positive charge although in majority of conductors the charge carrier is electron.

At first these concepts can be difficult to understand because we cannot see them. Electric current is one of the most basic concepts that exists within electrical and electronic science electric current is at the core of the science of electricity. 832 electric charge is carried by charged particles so an electric current is a flow of charged particles the moving particles are called charge carriers which may be one of several types of. The centimetre gram second units of current is the electrostatic unit of charge esu per second.

We can compare the electric current to the water flowing through the pipe. Electric current through conductor. Science physics current electricity introduction. When beginning to explore the world of electricity and electronics it is vital to start by understanding the basics of voltage current and resistance.

Ohm s law and circuits with resistors. If q current is flowing through any cross sectional. The current so defined above is the average current over the period t. An electric current is the rate of flow of electric charge past a point.

The direction of current is conventionally is in the direction of flow of positive charge. Read more concept of electricity what is current. Electric current is defined as the rate of flow of net charge through the conductor with respect to time. In this article we shall study the concept of current electricity the resistance ohm s law and the conductance of a conductor.

Build an intuitive understanding of current and voltage and power. A common unit of electric current is the ampere which is defined as a flow of one coulomb of charge per second or 6 2 10 18 electrons per second.