What is electric current in simple words?
An electric current is a flow of an electric charge between two points. … The electric charge in the electrons causes resistors in light bulbs and electric fires to heat up. It also creates magnetic fields in motors, inductors, and generators.
Can the word current be used for electric current?
noun Electricity. the time rate of flow of electric charge, in the direction that a positive moving charge would take and having magnitude equal to the quantity of charge per unit time: measured in amperes. Also called current, electricity.
What are types of current?
There are two kinds of current electricity: direct current (DC) and alternating current (AC). With direct current, electrons move in one direction. Batteries produce direct current. In alternating current, electrons flow in both directions.
What is SI unit current?
Unit of electric current: ampere (A)
The ampere, symbol A, is the SI unit of electric current. It is defined by taking the fixed numerical value of the elementary charge e to be 1.602 176 634 ×10−19 when expressed in the unit C, which is equal to A s, where the second is defined in terms of ∆νCs.
What is Ohm’s law state?
Ohm’s law states that the current through a conductor is proportional to the voltage across the conductor. … V=IR where V is the voltage across the conductor and I is the current flowing through it.
What you mean by current?
Current is a flow of electrical charge carriers, usually electrons or electron-deficient atoms. … The standard unit is the ampere, symbolized by A. One ampere of current represents one coulomb of electrical charge (6.24 x 1018 charge carriers) moving past a specific point in one second.
How current is generated?
When a voltage is applied to a conductor or semiconductor, electric current starts flowing. In conductors, positively charged protons are held in a fixed position and the negatively charged electrons move from one place to another place by carrying the charge. Thus, electrons conduct electric current in conductors.
Why do we have 2 types of current?
There are two different types of current in widespread use today. … In a direct current, the electrons flow in one direction. Batteries create a direct current because the electrons always flow from the ‘negative’ side to the ‘positive’ side. In a direct current, the electrons travel in one direction.