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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
Neutron is a fundamental particle which is necessary constituent of all nuclei except that of hydrogen molecule. It was discovered by Chadwick. (1) The charge of neutron: It is
Explain about the laser cutting and welding. Laser cutting and Welding: Laser cutting is a technology which uses a laser to cut materials, and is generally used for industri
Determine the value of ‘a' for which the vector field is solenoidal.
If you "bow" a string on a violin you hear a note with a frequency of 1020 Hz. If the length of the string is about 40cm, what is the "wave" on the string? Draw a diagram to show
in which machines mechanicle adva ntage is greater than one?????
Two bodies are moving in circular paths of equivalent radii. If the speed of the first body is twice that of the second, the centripetal acceleration of the first body is how
There is a point between the Earth and the Moon where the gravitational effects of the two bodies balance each other. Calculate the distance from the center of the Earth to this po
Wien displacement law: For blackbody, the product of the wavelength equivalent to the maximum radiancy and the thermodynamic temperature is a constant, the Wien displacement l
new ideas for physics projects ?
C onsid er that two large paralle l plates forming a capacitor are separated by a distance d with vacuumed as the dielectric medium between the plates. The plates are connected to
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