Electronics devices

Insulators, Conductors and Semiconductors Insulator I nsulators have no conductivity because of there is no conductivity electrons. Because of there energy gap between valance band and conduction band (5eV)                                                          Conductors Conductors is high conductivity material. because of there no energy gap between valance band and conduction band. Semiconductors In semiconductors small energy gap between valance band and conduction band. The conductivity of semiconductors lies between Conductors and Insulators. When the temperature is low, semiconductors behaves like a insulator, When increase the temperature more and more semiconductors behaves...

PN JUNCTION: Formation :- The N and P-type semiconductors are basic building blocks for semiconductor devices. Joining of N-materials and P- materials type semiconductor forms a PN junction which is importance in electronic systems.         PN Junction formed by doping of N-type impurity and P-type impurity side by side in a single piece of semiconductor. And it’s called PN Junction diode Inner of diode

ELECTRICITY 1) Charge is a fundamental particle in an account in an atom.It may be positive or negative. 2) Like charges repel each other. 3) Unlike charges attract each other.       Coulomb(C ) :S.I.unit of charge      1 Coulomb = Charge present an approx.6*10 to the power of 18 electrons 4) Charge on 1 electron = Negative charge of 1.6*10 per C                                                      Q = ne Where     Q = Charge(total)                 n = No. of electrons                 e = Charge on one electron Current(I):   the rate of flow of charge is called current.                               ...