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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 rod follower AB is subjected to a vertical up and down movement while resting on a circular contour of radius 30cm of a cam.the cam moves to the right with a velocity of 5 cm/s a
What is the size of an atom?What is the size of an atom?What is the size of an atom?What is the size of an atom?What is the size of an atom?What is the size of an atom?
The idea that electrons revolved in orbits around the nucleus of an atom without radiating energy away from the atom was postulated by: a) Thompson b) Bohr c) Ruther
Making a shadow stick In an open space on the school ground drive a 130 cm stick into the ground and let the children stay a record of the length of the shadow, calculated two
What is the maximum wavelength of the visible spectrum so that 3 rd order spectrum can be obtained by a plane diffraction grating having 5654 lines/cm?
The index of refraction of a particular medium is nearly the same for all wavelengths hence we often associate a single value the average value of the index of refraction to the me
Define Hydrogen Rocket? The reaction chamber of a rocket engine is supplied with a mass flow rate m of sufficient oxygen and hydrogen to allow complete burning of the fuel an
A mixture of methanol and water is to be separated in a new separation unit and you are required to provide a report detailing the design and costing of a distillation column with
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If A=3i+j+3k, B=-2i-4j-3k and c=2i+4j+3k. Find a unit vector parallel to 3A-2B+4C
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