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
Assignment in fluid motion

Draw and explain V-I characteristics of constant voltage and constant current sources. Ans: V-I Characteristics of Constant Voltage Source: A voltage source that has very low

Archimedes' principle A body which is submerged into a fluid is buoyed up through a force equal in magnitude to the weight of the fluid which is displaced, and directed upward

What makes a good illuminator? Illuminators should perform three separate tasks along with a degree of efficiency.  Initially must house a lamp and its transformer, power sourc

On the basis of mutual interactions or behavior of several materials in an external magnetic field, the materials are dividing in three basic categories. (i) Diamagnetic materi

A small bucket of mass M kg is attached to a long inextensible cord of length L m. The bucket is released when the cord is in horizontal position. At its lowest point the bucket sc


A sphere of mass m and radius r is on a smooth fixed inclined plane in equilibrium, if now the sphere is displaced by a small distance along the plane , what will be angular freque

Tachyon A purely speculative particle that is presumed to travel quicker than light. According to Einstein's equations of special relativity, a particle along an imaginary rest

When a system returns back to its initial state after passing by dissimilar phase, the phenomena is said to be a cyclic process. In this process as ΔU = 0. From first law of the