what is electricity , electric charge , point charge ? give definition?

Question

what is electricity , electric charge , point charge ? give definition?

Answer 1

ELECTRICITY IS ONE OF THE FOUR PILLARS OF PHYSICS

IN SCIENCE, WHICH ARE HEAT, LIGHT, ELECTRICITY & MAGNETISM.



IT IS THE PRIMARY DRIVE SOURCE FOR MANY EQUIPMENTS,

FURNACES, MOTORS, LIGHTING ETC. IN INDUSTRIES AS WELL

AS FOR COOKING, COOLING, HEATING, OPERATION OF TV,

SOUND SYSTEMS, COMPUTERS ETC. IN THE DOMESTIC SEGMENT.



IT COSTS A LOT FOR GENERATION OF ELECTRICITY BE IT HYDRO-

ELECTRIC, THERMAL POWER PLANT OR NUCLEAR POWER PLANT.

THE COST OF POWER GENERATED IS RECOVERED FROM THE ULTIMATE

USERS ( BOTH BULK CONSUMERS AND DOMESTIC USERS AT

DIFFERENT SLABS OF RATES ) WITH ADDITION OF OVERHEAD

EXPENDITURE FOR DISTRIBUTION , OPERATIONAL COSTS AND

OTHER EXPENSES. FOR THIS PURPOSE ELECTRICAL METERS ARE

INSTALLED AT EACH CONSUMER'S PLACE.



FOR CONSUMERS WHERE SUCH METERS ARE NOT INSTALLED,

CONSUMPTION IS CALCULATED ON THE BASIS OF NUMBER OF

POINTS IN USE AT THAT LOCATION, I.E. 15A POINTS, 5A POINTS,

LIGHT POINTS, POWER POINTS, ETC. FOR WHICH RATES ARE

PRE-DETERMINED AND CHARGED ACCORDINGLY.



HOPE YOU ARE FULLY CLARIFIED.

Answer 2

Electricity is the branch of physics dealing with electric charges. If the electric charges are at rest, then the branch gets the name static electricity. If charges dealt with are in motion, then the branch is known to be current electricity.

What is electric charge? It is the quality of energy. Charge can be of two types. They are positive and negative. This classification was first made by Benjamin Franklin. The charge of positive is identified with the proton which is within the nucleus of the atom. And negative charge is identified with the electrons which go round that nucleus. The charge is, so far, found to be quantised. Its least elementary value is measured by the famous Millikan's oil drop experiment as 1.602*10^--19 C.

But recent theory have introduced quark particles which have fraction of this elementary charge. So science goes on probing into the reality. So, if we collect 6.24219*10^18 protons, then we can expect almost One coulomb of charge.

Point charge is that charge whose dimension becomes negligible compared to the distance of the charge or to the distance of any point from the charge. That means, as one friend mentioned already, its diameter, area or volume could be easily neglected.

Answer 3

please choose it as a best answer plzzzzzz



ELECTRICITY:

The Electricity" is the electric charges. Dictionaries often define electricity as "a fundamental entity of nature consisting of negative and positive kinds." This is a scientist's definition of the word, where "quantity of electricity" means the same as "quantity of charge." In other words, electric charge is a charge of electricity. Franklin, Faraday, Maxwell, Millikan, Thompson, Einstein, and many other historical scientists used the word "electricity" in this way. They stated that an electric current was a flow of electricity. And whenever we talk about electricity flowing inside of wires, or talk about electrons being the particles of electricity, we're using the above definition.



ELECTRIC CHARGE:

A form of charge, designated positive, negative, or zero, found on the elementary particles that make up all known matter. Particles with electric charge interact with each other through the electromagnetic force, creating electric fields, and when they are in motion, magnetic fields. The electric fields tend to result in a repulsive force between particles with charges of the same sign, and an attractive force between charges of opposite sign. The electron is defined to have an electric charge of -1; the protons in an atomic nucleus have charge of +1, and the neutrons have charge of 0.

A Closer Look Electric charge is a basic property of elementary particles of matter. The protons in an atom, for example, have a positive charge, the electrons have a negative charge, and the neutrons have zero charge. In an ordinary atom, the number of protons equals the number of electrons, so the atom normally has no net electric charge. An atom becomes negatively charged if it gains extra electrons, and it becomes positively charged if it loses electrons; atoms with net charge are called ions. Every charged particle is surrounded by an electric field, the area in which the charge exerts a force. Particles with nonzero electric charge interact with each other by exchanging photons, the carriers of the electromagnetic force. The strength and direction of the force charged particles exert on each other depends on the product of their charges: they attract each other if the product of their charges is negative and repel each other if the product is positive. Thus two electrons, each with charge -1, will repel each other, since -1 × -1 = +1, a positive number. Static electricity consists of charged particles at rest, while electric current consists of moving charged particles, especially electrons or ions



POINT CHARGE:



an electric charge considered to exist at a single point, and thus having neither area nor volume.

Answer 4

Based on my book in Physics:



Electricity is a form of energy generated by several factors such as friction, induction, chemical change and others.



Electric charge is an intrinsic property of protons and electrons of which all matter composed. It is quantized because any electric charge "q" occurs in integers of multiple of elementary, indivisible charges. NOTE: this can only be felt.



Point charge is simply an electric charge that exists in a particular point.

Answer 5

electricity is d flow of electrons.

Electric charge is a fundamental conserved property of some subatomic particles.

point charge is an idealized model of a particle which has an electric charge. A point charge is an electric charge at a mathematical point with no dimensions.