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What are semiconductors? Give an example for n-type semiconductors.
Semiconductors are materials having electrical conductivity among that of insulators and conductors. This is because, in semiconductors, there is only a small difference in energy among the ?lled valence band of electrons and the empty conduction band. They are the solids which act as insulator at absolute zero but conduct electricity at ordinary temperatures. For instance, N-type semiconductor is obtained by doping Phosphorous or Arsenic on Silicon or Germanium
A student throws a set of keys vertically upward to his fraternity brother, who is in a window 4.40 m above. The brother's outstretched hand catches the keys 1.30 s later. (a) W
An astronaut on a small planet wishes to measure the local value of g by timing pulses traveling down a wire which hasa large object suspended from it. Assume a wire of mass3.50
Q. The Rydberg's constant for hydrogen is 1.097 X 10 7 ms -1 . Calculate the shortest wavelength limit of Lyman series. Data : R = 1.097 × 10 7 m -1 For small wavelen
Derive the mathematical relation connecting n,u,v and R for refraction at a spherical surface concave towards a point object in a denser medium.
determine the magnitude of Poynting vector end the energy per unit time delivered to a wire of length land cross section A when electric current I flow in it
A body moving in the positive x direction passes the origin at time t=0. Between t=0 and t=1 second, the body has a constant speed of 24 meters per second. At t=1 second, the body
(1) In Boolean algebra only two types of state variables (0 and 1) are permitted. (2) The variables (A, B, C ....) of Boolean algebra are subjected to three operations.
Given the following thermodynamic information, develop the Ag-CN-H 2 O Eh-pH diagram for a solution containing 1 × 10 -3 M [Ag] and 5 × 10 -3 M [CN] at 25 o C. Please show all wo
It is defined as an electric strain produced in an atom due to application of external electric field to the bulk material. It is the result of the displacement of the positively c
Platinum: Atomic number 78 Symbol p t Atomic weight 195.09 Discovery Olloa 1735
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