Movement of charge, Physics

MOVEMENT OF CHARGE:

Although electric current is referred to as the flow of electrons through a conductor, it should be noted that more exactly, any movement of electric charge constitutes an electric current. Thus, passage of electricity may occur through a:

• conductor such as metal, due to the movement of the loosely held outer electrons of the atoms.
• vacuum or gas, due to the movement of electrons.
• gas, due to the movement of the ionised gas molecules.
• liquid, due to the ionisation of certain molecules, particularly those of acids and salts in solution (e.g. Electrolytes).

The ampere may be defined in terms of the mechanical units of force and length, a more helpful picture is that of moving electrons. When a current of one ampere is flowing in a conductor, one coulomb of charge passes any point in the conductor every second.

The ampere is thus a measure if the rate of flow of electrons.

 

Posted Date: 9/13/2012 1:36:33 AM | Location : United States







Related Discussions:- Movement of charge, Assignment Help, Ask Question on Movement of charge, Get Answer, Expert's Help, Movement of charge Discussions

Write discussion on Movement of charge
Your posts are moderated
Related Questions

a balloon is filled with 100 kg of helium, and that the velocity is 2.0 m / s what is the external kinetic energy?

Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4


KINEMATIC CHAIN : Refers to an assembly of rigid bodies connected by joints that is the mathematical model for a mechanical system. As in the familiar use of the word chain, the ri

Core type Transformers: In this type of transformer the windings enclose the core (fig. given below). Both the windings are divided and half of every winding is placed on eac

A machine performs 8 Joules of work in 2 seconds. How much power is delivered by this machine? Ans: The power is delivered by this machine is 4 watts.

CONSERVATION OF ENERGY 1.   Potential energy is, as the word suggests, the energy "locked up" up somewhere and which can perform work. Potential energy Potential energy can b

Huygens' construction; Huygens' principle (C. Huygens): The mechanical propagation of any wave (exclusively, of light) is equal to supposing that each point on the wavefront b

Forging:   Forging is shaping of metal either by impact or steady compression among a hammer or ram and anvil. Related to hammering or pressing of metal, the main difference among