Concept Of Electric Current

Science physics current electricity introduction.

Concept of electric current. Electric current is defined as the rate of flow of net charge through the conductor with respect to time. As long as the battery continues to produce voltage and the continuity of the electrical path isn t broken charge carriers will continue to flow in the circuit. The centimetre gram second units of current is the electrostatic unit of charge esu per second. 614 an electric current is said to exist when there is a net flow of electric charge through a region.

Introduction to circuits and ohm s law. The direction of current is conventionally is in the direction of flow of positive charge. 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. Ohm s law and circuits with resistors.

At first these concepts can be difficult to understand because we cannot see them. Electric current through conductor. 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. 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.

We can compare the electric current to the water flowing through the pipe. These are the three basic building blocks required to manipulate and utilize electricity. Understanding the concept of electric 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.

Following the metaphor of water moving through a pipe this continuous uniform flow of charge through the circuit is called a current. One ampere equals 3 10 9 esu per second. The current so defined above is the average current over the period t. A 60 watt lightbulb pulls.

In this article we shall study the concept of current electricity the resistance ohm s law and the conductance of a conductor. The instantaneous current is given as l q t. 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. Commercial power lines make available about 100 amps to a typical home.

An electric current is the rate of flow of electric charge past a point. If q current is flowing through any cross sectional. Read more concept of electricity what is current. When beginning to explore the world of electricity and electronics it is vital to start by understanding the basics of voltage current and resistance.

It is the flow of charge per unit time. Build an intuitive understanding of current and voltage and power.