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1. (a). what is the need for power factor correction?
(b). A 3phase synchronous. Motor is connected in parallel with a load of 500 KW, 0.8p.f lagging and its excitation is adjusted until it raises the total P.F to 0.9 lagging. If the mechanical load on the motor including loss takes 125KW, calculate the KVA input to the motor. Draw pharos diagram for condition.
2. i) What are the disadvantages of low power factor? How to avoid it?
ii) What are the measures relates to power quality?
A 230V shunt motor having an armature resistance of 0.05 W and a field resistance of 75 W draws a line current of 7 A while running light at 1120 rev/min. The line current at a given load is 46 A.
If possible, compare your results to those obtained from a microwave CAD tool.
A 345-kV, three-phase transmission line delivers 500 MVA,0.866 power factos lagging, to a three-phase load connected to itsreceiving end termines. Assume that the load is Δ connectedand the voltage at the receiving end is 345kV.
a mobile telelphone system mts has 10 channels operating at 30 khz with a max 80 kilometer range. what is the
Write the VHDL architecture file for the Y(5) output only for a 8-to-1 demultiplexer. The inputs are D, the selects S0-S2, and the ouputs Y(0)-Y(7). the select lines are bit_vector types, the data is bit type and the outputs are bit_vector types.
If an npn transistor is operating with the base transmitter junction forward biased and the base collector junction reverse biased. Given that the transistor has Ic=10mA and Ie=10.5 mA, determine the values of Ib,alpha and beta.
The silicon substrate is N-type (doping level ND = 7x10^16cm-3), and the gate is heavily doped N+-type polysilicon. Assuming zero oxide charge density, determine the density of mobile charge at the semiconductor surface, if the voltage applied bet..
Use decomposition to find the minimum gate input cost, multiple level implementation for the functions given, using AND, OR, NOT, XOR gates: a) F(A,B,C,D)=sigma(m)(5,6,7,9,10,11) b) G(W,X,Y,Z)=sigma(m)(5,6,7,9,10,11,14,15)
The power is generated by a DC power facility at a voltage of 10 V and deliver by two power lines with resistance Rline=3 ohm. The maximum power the voltage source can deliver is 5 W. a) Find the total power delivered by this DC voltage source
Draw a state diagram for a Finite State Machine with one input, z, and three outputs, a, b, c. abc should always follow the following sequence when z = 0: 000, 001, 011, 111, 101, 100, 110, 010, repeat. abc should go to the previous value
design a band pass filter that doesn't attenuate signal. Is that possible. allow frequencies between 1khz and 3khz. Basically have unity gain and not allow signals between 1khz and 3khz.
A 10-watt signal is connected to a low-pass channel with bandwidth B Hz. If the channel is corrupted by additive whiteGaussian noise (AWGN) with singel-sided power spectral density of10-7 Watts/Hz.
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