Voltage should be more correctly called "potential difference". It is actually the electron moving force in electricity (emf) and the potential difference is responsible for the pushing and pulling of electrons or electric current through a circuit. To produce a drift of electrons, or electric current, along a wire it is necessary that there be a difference in "pressure" or potential between the two ends of the wire. This potential difference can be produced by connecting a source of electrical potential to the ends of the wire. As I will explain later, there is an excess of electrons at the negative terminal of a battery and a deficiency of electrons at the positive terminal, due to chemical action. Then it can be seen that a potential difference is the result of the difference in the number of electrons between the terminals. The force or pressure due to a potential difference is termed e.m.f. or voltage.
See: electron theory An emf also exists between two objects whenever there is a difference in the number of free electrons per unit volume of the object. If the two objects are both negative, current will flow from the more negatively charged to the less negatively charged when they are connected together. There will also be an electron flow from a less positively charged object to a more positively charged object. The electrostatic field, i.e. the strain of the electrons trying to reach a positive charge or from a more highly negative charge is emf or voltage. It is expressed in units called volts, short for voltage. A volt can be defined as the pressure required to force a current of one ampere through a resistance of one ohm. To make this easier to visualise, consider the water pressure (voltage) required to pass a litre of water (current) through a copper pipe of a certain small diameter (resistance). Also try and visualise water going through other pipes of varying diameters (smaller to larger in size). Either the water pressure required would vary or the volume delivered would vary, or both. You have just grasped the basics of ohms law, where E = voltage; I = current in amperes and R = reistance in ohms: Some examples: Chemical (batteries) e.g. dry cell 1.5V, wet cell storage about 2.1V Electromagnetic (generators) Thermal (heating junctions of dis-similar metals) Piezoelectric (mechanical vibration of certain crystals) Photoelectric (light sensitive cells)
Electricity is the movement of electrons through a conductor. Electrons are attracted to protons. Since we have excess electrons on the other end of the conductor, we have many electrons being attracted to the protons. This attraction sort of pushes the electrons toward the protons. This push is normally called electrical pressure. The amount of electrical pressure is determined by the number of electrons that are attracted to protons.
There are many theories about electrons, but perhaps the most fascinating is quantum theory. It offers a unique explanation of the universe. It is so complex, even Einstein never quite got a handle on it.
Electrons, as far as we can tell, never exist in a measurable precise location, the more accurately you measure its location, the less you can measure its velocity, we have to bounce light off a particle to see it, these photons move the electron in question, ruining the measurement. That's uncertainty. If you look at something small, you change its position or velocity in doing so. We must use probability to make measurements of electron motion.
Electrons also have the unique property, best summed up by Richard Feyman "electrons behave like particles...no they don't exactly, they also behave like waves...no they don't exactly."
Not much of an answer I know, but that's why it's a theory.
electron flow theory in a electric circuit is which transfer the electron in a circuit by through a conductor. The electron fow -ve to +ve terminal.
The electron theory basically states that the movement of electrons in a conductor results in electricity. The point of this theory is an explanation of the behavior of electricity.
A positively charged proton, and the neutron which has no charge!
When we consider electron flow, we think of moving electrons. The electron has a negative charge. This model of current flow, the electron current flow model, follows the movement of those negative charges.As a contrast, we might consider what is called conventional current flow. And that the model of current involves the movement of charges with a positive polarity.
You don't need a "law of current" from that, but you can derive it from Ohm's Law.
valence band current flow.
Electron pairs
Amperemeter (or Ammeter)
Negative to positive
Probably in reference to electron flow. Electricity knowledge is based upon a theory. It is suggested that electrons flow in a wire although we cannot see them FLOW. It is generally accepted that electrons flow from positive to negative, although experts in the field suggest they may flow in the opposite direction. There is a lot of controversy over this theory of electron flow.
When we consider electron flow, we think of moving electrons. The electron has a negative charge. This model of current flow, the electron current flow model, follows the movement of those negative charges.As a contrast, we might consider what is called conventional current flow. And that the model of current involves the movement of charges with a positive polarity.
Conventional Electrical theory (simplified) states that electricity flows from positive to negative in contrast to Electron Theory which supposes negative to positive flow of electrons.
You don't need a "law of current" from that, but you can derive it from Ohm's Law.
Because much of the theory of electricity was developed before scientists realised that it was not a moving positive charge that was responsible but a negative one (of the electron).
write note on free electron theory
1.6x10^19 amperes is the amount of current that a flow of an electron will contain.
Electronic theory is the theory of the behavior of the electron under various conditions including a free electron, a bound electron in either an outer or inner orbit of the atom.
What do you mean with "meet"? Conventional flow and electron flow are not two types of currents. They are two ways to analyze the SAME currents.
free electron model not take into account the potential neither the electron interaction. nearly free electron take into account the potential.J.C. Aguiar
Electron flow is known as current. SI unit is Ampere