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A bus in a balanced three-phase power system has a three-phase capacitor bank that supplies 1200 kVAR. In parallel with the capacitor bank is a three-phase load that draws 3500 kW at a power factor of 0.707 lagging. The line-to-line voltage at the bus is 138 kV. What is the resultant power factor and magnitude of the current into the parallel load?
Power Systems Theory Definitions and Formulas, Define, (a) The fault level of a system or unit in a system, (b) base MVA
The following MATLAB command has been used to perform offline filtering y=filter([0.8 -0.8],[1 -0.3],x); Where x and y are the input and output vectors, respectively. What is the transfer function of the filter
Calculate the thermal-equilibrium electron and hole concentrations in a compensated p-type semiconductor. Consider a silicon semiconductor at T=300K in which Na = 10e16 cm-3 and Nd=3x1015 cm-3. Assume ni = 1.5 x1010 cm-3.
How to Combine the following expressions into a single sinusoid and plot both the combined and original expressions in Matlab across 2 periods. a) 2cos(3t)-cos(3t-pi/4) b) sin(2t- pi/4) + 2cos(2t-pi/3) c) cos(t) - sin(t) d) 10cos((pi*t) + pi/3) + ..
Given a resistor of 80-ohm connected to a 12 V battery, find the power absorbed by the resistor. What are the consequences if the resistor is rated at one-quarter watt.
Suppose you want to build a simple RS flip-flop that is set and reset by negativegoing pulses. All you have are two 2-input AND's and two 2-input NOR's. Show how you would build this odd circuit from the available material.
consider the dual circuit where the value of the inductor is L=1H, the initial current in the inductor is iL(0)=-1amps, and the input is the source vs(t). Let vs(t)=u(t)=u(t-1). Plot the corresponding current iL(t) for all times.
(a) Determine free electron and hole concentration.(b) Calculate the effective density of states at valence band, Nv. Given that ni = 1x1010 cm3 and kT = 0.026.
A 3-phase, 5 MVA, 11 kV, 60 Hz synchronous machine has a synchronous reactance of 10 Ohms per phase and has negligible stator resistance. The machine is connected to the 11 kV, 60 Hz bus and is operated as a synchronous condenser
An electric kettle needs six minutes to boil 2 kg of water from the initial temperature of 20"C. The cost of electrical energy required for operation is 12 paise, the rate being 40 paise per kWh.
Discuss different applications that could use non-inverting and inverting amplifier circuits. Will the actual op Amp characteristics cause any challenges it used for each application.
A 4KHz audio signal is transmitted by using a PCM system and the quantization level, L is 256. Find transmission bit rate.
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