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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
Ask question 15. When the movable mirror of a Michelson''s interferometer is moved through a distance of 0.03mm, 100 fringes are displaced, what is the wavelength and color of the
Resistivity of conductors is most affected by (A) Composition. (B) Temperature. (C) Pressure. (D) Current. Ans: Resistivity of conductors is most
How to find out neutral point ? What all things we require to equate or form a equation to find the neutral poind and how to do it?
When the current in the primary coil of 400 turns of a magnetic circuit, enhances linearly from10mA to 35mA in 100ms, an e.m.f. of 75mV is induced into the secondary coil of 240 tu
THOMSON'S ATOMIC MODEL:- According to Thomson's atomic model positive charge is distributed uniformly over the entire body of the atom while the electrons are embedded in it. S
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why the reflective index of cladding is lower then in core of a fiber optic?
A 5.0-cm-tall object is placed 16 cm from a convex lens with a focal length of 8.4 cm. What are the image height and orientation?
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