2:26 pm
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by md. raju ahmed bappa
SEMI-CONDUCTORS:
a semi-conductor is a material that has an electrical conductivity between that of a conductor and an insulator.This means roughly in the range 10^3 siemens per c.m. to 10^-8s/cm.Exposure to an electrical field, to different temparatures or frequencies of light may change a semiconductors conductivity.
2:04 pm
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by md. raju ahmed bappa
Insulator:
An insulator is amaterial that resists the flow of electick current.An insulating mateial has atoms with tightly bonded valance electrons.These materials are used in parts of electrical equipment to support or separate electrgcal conductors without passing current through themeselves.The term is also used more specifically to refer to insulating supports that attch electric power transmission wires to utility poles or pylons. Some materials such as glass, paper or Teflon are very good elctrical insulators.
CONDUCTOR:
A conductor is a material which contains movable electric charges.In metalic conductors,such as copper or almuniam, the movable charged particles are electrons. positive charges may also be mobile in the form of atoms in a lattice that are missing electrons, or in the form of ions, such as in the electrolyte of battery.
9:24 am
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by md. raju ahmed bappa
2:50 pm
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by md. raju ahmed bappa
hello friends newly starting blogging, hope i will make my blog apopular one to everybody
