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Q. What is thermal runaway.
The problem of self heating arises due to dissipation of power at the collector junction. The leakage current ICBO is extremely temperature dependent and increase with the rise of temperature of collector base junction. An increase in ICBO causes an increase in collector current IC considerabely. With the increase in collector current ,collector power dissipation increase which raises the junction temperature which leads to further increase in collector current. The process is cumulative and may lead to the eventual destruction of the transistor . This phenomenon is called thermal runaway.
A circular ring of magnetic material has a mean length of 1m and a cross sectional area of .001m^2.A sawcut of 5mm width is made in the ring . calculate the magnetizing current req
Write short notes of the following. a) Microprocessor b) Modes of data transfer. c) I/O processor d) Associative memory e) Software and Hardware interrupt
Memory map of tpa in a personal computer and explain such of the areas in brief
There are total 12 interrupts in 8085.
Explain electric polarization. Electric polarization : This polarization density is the vector field such expresses the density of permanent or induced electric dipole momen
Find out Form factor and Peak factor: For the output of full wave rectifier, find out (a) RMS value, (b) Average value, (c) Form factor, and (d) Peak factor. S
Q. A shift register can be used as a binary (a) divide- by-2, and (b) multiply-by-2 counter. Explain. Q. Show a block diagram of a 4-bit shift-right register using JKFFs.
It is uneconomic to provide adequate equipment to carry all the traffic which could possibly be offered to a telecommunication system. In a telephone exchange it's theoretically po
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
How to Make LPG Safer in the Laboratory The following must be observed in the laboratory: 1. The LPG cylinders should be kept outside the laboratory in a ventilated room.
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