Tell about Electric Currents ?

heat energy is generated in the conductor.

Natural observable examples of electrical current include lightning, static electric discharge, and the solar wind, the source of the polar auroras.

The heating effect

Man-made occurrences of electric current include the flow of conduction electrons in metal wires such as the overhead power lines that deliver electrical energy across long distances and the smaller wires within electrical and electronic equipment.

of an electric current depends on three factors:

Eddy currents are electric currents that occur in conductors exposed to changing magnetic fields. Similarly, electric currents occur, particularly in the surface, of conductors exposed to electromagnetic waves. When oscillating electric currents flow at the correct voltages within radio antennas, radio waves are generated.

The resistance, R of the conductor.

In electronics, other forms of electric current include the flow of electrons through resistors or through the vacuum in a vacuum tube, the flow of ions inside a battery or a neuron, and the flow of holes within metals and semiconductors.

Current can be measured using an ammeter.

At the circuit level, various techniques are used to measure current:

In conductors where the charge carriers are positive,

Shunt resistors[13]
Hall effect current sensor transducers
Transformers (however DC cannot be measured)
Magnetoresistive field sensors

conventional current is in the same direction as the charge carriers.

In a vacuum

Joule heating, also known as ohmic heating and resistive heating, is the process by which the passage of an electric current through a conductor produces heat

a beam of ions or electrons may be formed. In other conductive materials,

the electric current is due to the flow of both positively and negatively charged particles at the same time.

Two examples of static electricity are lightning and rubbing your feet on the carpet and then touching a doorknob.

It was first studied by James Prescott Joule in 1841.

Current electricity is a constant flow of electrons.

Joule immersed a length of wire in a fixed mass of water and measured the temperature rise due to a known current through the wire for a 30 minute period.

By varying the current and the length of the wire he deduced that the heat produced was proportional to the square of the current multiplied by the electrical resistance of the wire.

There are two kinds of current electricity: direct current (DC) and alternating current (AC).

This relationship is known as Joule's First Law. The SI unit of energy was subsequently named the joule and given the symbol J. The commonly known unit of power, the watt, is equivalent to one joule per second.

There are two types of Electricity,