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Q. Physical operation of the junction of diode?
The physical operation of the junction can be described in terms of the charge-flow processes. Usually there is a greater concentration of holes in the p-region than in the n-region; similarly, the electron concentration in the n-region is greater than that in the p-region. The differences in concentration establish a potential gradient across the junction, resulting in a diffusion of carriers, as indicated in Figure (a). Holes diffuse from the p-region to the n-region, electrons from the n-region to the p-region. The result of the diffusion is to produce immobile ions of opposite charge on each side of the junction, as shown in Figure (b), and cause a depletion region (or space-charge region) in which no mobile carriers exist.
The immobile ions (or space charge), being of opposite polarity on each side of the junction, establish an electric field because of which a potential barrier is formed and drift current is produced. The drift current causes holes to move from the n-tothe p-region and electrons to move from the p-tothe n- region, as shown in Figure (c). In equilibrium and with no external circuit, the drift and diffusion components of current are equal and oppositely directed. The potential barrier established across the depletion region prohibits the flow of carriers across the junction without the application of energy from an external source.
Technical Losses in Power Systems The technical losses in power systems occur because of energy dissipated in the conductors and equipment used for transmission, transformat
The Lennox to Bowmanville 500 kV circuit, spanning a distance of about 180 km, has series (inductive) impedance j 0.0224 pu and shunt (capacitive) admittance j 2.34 pu, quoted on b
Ask question #Minimum 100 words What is neeed of differential amplifier
Define the basic working principle , process characteristics,advantages, disadvantages and application of Laser Beam Machining Process.
Q. Implement the following Boolean functions by employing 8-to-1multiplexers. (a) F 1 (A,B,C) = Σ m i (0, 2, 4, 6) (b) F 2 (A,B,C) = Σ m i (1, 3, 7)
Explain different stage in energy audit?
A color television receiver is shown in Figure in block diagram form, indicating only the basic functions. The early part forms a straightforward superheterodyne receiver, except f
Q. A diode is connected in series with a voltage source of 5 V and a resistance of 1 k. The diode's saturation current is given to be 10 -12 A and the I-V curve is shown in Find
Q. Point charges, each of √4πε 0 C, are located at the vertices of an equilateral triangle of side a. Determine the electric force on each charge.
if contents of accumulator are all one''s then result would be zero so Z flag should be affected and same if all zero''s.....but here it is written that no flags is affected...
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