Based on the composition of semiconductors, there are two types of Semiconductors namely Elemental semiconductors and Compound Semiconductors. Elemental semiconductors These are made from single element and also known as indirect...
Category - Physics
As semiconductors have evolved and become more powerful, they have propelled many industries forward into a technological age. They are still an expensive component in many devices, so their pricing and demand trends go a long...
Carrier concentration in metals is the number of electrons N(E) per unit volume in the energy interval E and E + dE. Each electron energy level can accommodate two electrons as per Pauli’s exclusion principle. We have, The...
It is an expression for the distribution of electrons among the energy levels as a function of temperature. The probability of finding an electron in a particular energy state of energy E is given by, Where, EF − Fermi...
According to classical free electron theory the electrons in a metal make random elastic collisions in all directions and the net current is zero. When a constant electric field is applied to the metal, the electrons are...
A beam is a rod of uniform cross section of an elastic materials, whose length is much greater as compared to its thickness and breadth. The beams are usually set in horizontal position and are designed to support heavy loads...
It is a Macroscopic theory developed by Drude and Lorentz in 1900. A metal has nucleus with revolving electrons and the electrons move freely like molecules in a gas. The free electrons in a metal are moving in a uniform...
The energies possessed by electrons in a metal is given by the energy distribution function. Density of energy states Energy Distribution graph Fig (1) The energy distribution for the tungsten for T = 0° K and T=...
The classical free electron theory is used to verify the Ohm’s law. In order to verify the same, consider that the steady state current density can be written as eqn (1) Similarly the steady state electrical conductivity eqn...
1.What is laser? It is a device which produces powerful, monochromatic, collimated beam of light in which the light waves are coherent. It is an acronym for Light Amplification by Stimulated Emission of Radiation. 2. What are...
