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What is meant by doping? How does it affect a semiconductor?
Doping: The process through which an impurity is added to semiconductor is termed as doping. A semiconductor to that an impurity at controlled rate is added to make this conductive is termed as an extrinsic semiconductor. The reason of adding impurity into the semiconductor crystal is to raise the number of free electrons or holes to make this conductive. When pentavalent impurity is added to a pure semiconductor a large number of electrons will exist in this. If a trivalent impurity is added many of holes will exist into the semiconductor.
Mathematical relationship between the induced e.m.f and the network Faraday noted that the e.m.f induced in a loop is proportional to the rate of change of magnetic flux by it:
Design a MOD-6 synchronous counter using J-K Flip-Flops.
Q. What do you mean by Star Topology? Star Topology: In Star topology, all user nodes are connected to central node point that interconnects all individual users' links and nod
Q. Give a brief description of integrating circuits ? Integration is a summation of area. An integrating circuit produces an output voltage which is proportional to the area en
Q. Comment brie?y on the following: (a) Why are waveguides not used at low frequencies? (b) Why are open-wire lines not generally used as guiding structures at very high freq
Q. What do you mean by sub address? A sub address, though a part of the ISDN address, isn't considered as an integral part of the numbering scheme. Sub address is carried in a
Q. Illustrate Sources and Loads? A source-load combination is represented in Figure. A node is a point at which two or more components or devices are connected together. A part
The French scientist, Ampere, (1775- 1836), conducted a series of experiments on the force between current carrying conductors. He found that: force per metre of wire (
a) A 230 V/25V, 50 HZ transformer with a rated primary current of 1,2 Amps is used to supply a number of 25 V, 30 Watt halogen light bulbs. Assuming an ideal transformer and that
explain why entropy of a gas increases with volume and tempearture
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