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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 report on electrostatic shielding
Common dime-store cells and batteries The cells you see in the grocery, department, drug, and hardware stores which are popular for use in household convenience items such as
Advantages of A.C. transmission of power 1. The power can be produced at high voltages. 2. The maintenance of a.c. sub-stations is simple and cheaper. 3. The a.c. voltage
What do you mean by the ratio of the frequency of fourth overtone to the fundamental frequency of a stretched string?
solving physics project
Ferromagnetic substances: on the basis of domain theory A. 1. In a ferro magnetic substance, large no. of domains occur. 2. The direction of magnetisation with in a
Q. What are the methods of inducing emf in a circuit? The induced emf is able to be produced by changing a) The magnetic induction (B) b) Area enclosed by the coil (A) f
Define the working of Optical-Fiber Infrasound Sensors. Optical-Fiber Infrasound Sensors: An OFIS comprises a sealed hose and a fiber-optic Mach-Zehnder interferometer
describe the principle, construction and working of Michelson Interferometer.
Significance of Quasi-Fermi Level with Aid of Band Diagram (a) Explain with diagrams different types of trap assisted generation and recombination. (b) Explain the signific
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