Question

write about Electric Current​

Answer 1

Answer:

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An electric current is the rate of flow of electric charge past a point or region. An electric current is said to exist when there is a net flow of electric charge through a region. Electric charge is carried by charged particles, so an electric current is a flow of charged particles.

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Answer 2

Answer:

An electric current is the rate of flow of electric charge past a point[1]:2[2]:622 or region.[2]:614 An electric current is said to exist when there is a net flow of electric charge through a region.[3]: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, and in different conductors may be different types of particle. In electric circuits the charge carriers are often electrons moving through a wire. In an electrolyte the charge carriers are ions, and in an ionized gas (plasma) are ions and electrons.[4]

Electric current

A simple electric circuit, where current is represented by the letter i. The relationship between the voltage (V), resistance (R), and current (I) is V=IR; this is known as Ohm's law.

Common symbols

ISI unitampere

Derivations from

other quantities

{\displaystyle I={V \over R}\,,I={Q \over t}}DimensionI

The SI unit of electric current is the ampere, which is the flow of electric charge across a surface at the rate of one coulomb per second. The ampere (symbol: A) is an SI base unit[5]:15 Electric current is measured using a device called an ammeter.[2]:788

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