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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
Vectors Representing Forces A force can be represented by a vector (drawn as an arrow). The arrow's length is related to the size of the force and the arrow's direction shows y
The stress at which the specimen breaks or reptures ultimately is known as ultimate strength. We also called this TENSILE STRENGTH .
What is Gas Laws? Kinetic theory states that the speed of motion of the molecules in a substance decreases as the substance's temperature decreases. As well, the speed of motio
An elevator is stopped at the ground floor. It starts moving upwards at constant acceleration for 5 seconds. It then keeps a constant speed for 35 seconds. Finally, it slows down
Binding energy of a system is described as the energy released when its constituents are brought from infinity to form the system. It can also be explained as the energy required s
defination of multples and sub multiples
A galaxy in the constellation UrsaMajor is receding from the earth at 15,000 km/s. If one of the characteristic wavelengths of the light the galaxy emits is 550 nm, what is the cor
Explain Shifting pendulums?? Get two soda water bottles that are exactly the similar size. Fill them with water and cork tightly. Place a rod across the back of two chairs. Sus
Q. Select the pairs of isotopes, isobars and isotones from the following nuclei: 11 Na 22 , 12 Mg 24 , 11 Na 24 , 10 Ne 23 Isotopes are 11 Na 22 , 11
Q. Point out the direction of the current if any induced to flow in the coil by the changing magnetic field. Answer: 1. Given: declining number of magnetic field line
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