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What is Avalanche Breakdown
Minority carriers, under reverse biased conditions, flowing through the junction acquires a kinetic energy that increases with increase in reverse voltage. At a sufficiently high reverse voltage (say 5v or more), kinetic energy of minority carriers becomes so large that they knock out electrons from the covalent bonds of semiconductor material. As a result of collision, liberated electrons in turn liberate more electrons and current becomes very large leading the breakdown of crystal structure itself. This phenomenon is known as Avalanche Breakdown.
Q. Define Fermi energy. Write down the expression for Fermi Dirac distribution law. Deduce an expression for Fermi energy of a system of free particles. Sol. The Fermi Energy
A transformer has 124 turns on the primary coil and 18,600 turns on the secondary coil. a. Is this a step-down or a step-up transformer? step-up transformer
why a metal disc is thrown up when it is placed on the top of an electromagnet is the current is switched on?
what is the importance of si unit
AVERAGE VELOCITY: The ratio of the total displacement to the total time taken by the body is known as average velocity and represented by V ?av.
Rules to verify how many significant numbers has in a calculated quantity: 1. All nonzero digits are significant. As like 457 cm has three significant values; 0.25 g has two si
Understand the manufacturing technique of optical fibres by using double crucible method. In double crucible method the inner platinum crucible has core material into molten fo
Used normally, a 150-watt, 120 volt light bulb requires how many amps of current? Ans: Used generally, a 150-watt, 120 volt light bulb needs 1.25 amps.
a) The potential at a particular distance form a point charge is 600 volts and the electric field is 200 N/C. b) Describe distance of the point charge? c) Describe magn
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