An electric current is formed when electrons flow through a material. In simple language we can say current is like a flow of water in pipe. Assume that the water flowing through a pipe is like current.
Normally copper wire is used for transmission of current .Electrons normally rotate around the nucleus of each atom of copper in the wire, but when electrical pressure (that is the voltage) from a battery or generator is applied, some of these electrons are forced out of their orbits and pass from atom to atom along the length of the wire. These electrons are called free electrons and come from the outer orbit of the atom.
The amount of current depends on the number of electrons passing a given point in a circuit each second. It is measured in Amperes (A) using an apparatus called an Ammeter. An ammeter must be connected in series with other devices in a circuit. The letter I is used to signify the amount of current in a circuit.
Voltage is the potential energy that makes the electrical current flow in a circuit by pushing the electrons around. Voltage is like pressure on water in a pipe flowing from upper side to lower side .voltage means pressure on electrons to flow .The unit of voltage is volt shown as 'v'. And it is measured by voltmeter.
Normally copper wire is used for transmission of current .Electrons normally rotate around the nucleus of each atom of copper in the wire, but when electrical pressure (that is the voltage) from a battery or generator is applied, some of these electrons are forced out of their orbits and pass from atom to atom along the length of the wire. These electrons are called free electrons and come from the outer orbit of the atom.
The amount of current depends on the number of electrons passing a given point in a circuit each second. It is measured in Amperes (A) using an apparatus called an Ammeter. An ammeter must be connected in series with other devices in a circuit. The letter I is used to signify the amount of current in a circuit.
Voltage is the potential energy that makes the electrical current flow in a circuit by pushing the electrons around. Voltage is like pressure on water in a pipe flowing from upper side to lower side .voltage means pressure on electrons to flow .The unit of voltage is volt shown as 'v'. And it is measured by voltmeter.
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