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a load consisting of induction motor is draming 80 kw from a 220 v ,60 hz power line of 0.72 lagging .find the capacitance of a capacitor required to raise the pf to 0.92
Calculate the parameters RE and XE, and the maximum efficiency and power output for the transformer when a load with a 90% lagging power factor is connected to the transformer secondary winding.
the output voltage of battery drop from 6V .With no load to 5.2V with a load current of 400mA. calculate the internal resistance.
What is the primary source of distortion with a Class B amplifier. What are some ways the distortion can be minimized and discuss the tradeoffs that exist when implementing these distortion minimizing methods.
What device can be used to connect to data bus with enable/disable capability. When all these kind of devices tied to the bus are disabled, what logic level is on the bus line.
a. What dopant should the engineer use to obtain the largest fraction of the boule with a doping concentration between 2 - 6 x 1014 cm-3 b. What is the range in resistivity values for this doping variation c. What is the weights of the dopant and Si..
Current and average power delivered to the load, A load has a 20 ohm resistor and a 4 henry inductor connected in series. It is connected to a power source with v(t)= 100cos50t
The system has total capacitance CT = 1.0 muF (10 ^ 6 Farad) and average frequency in use at 10kHz. The transformation of battery power to power inn the microcontroller and additional components occurs with virtually no losses.
The high-voltage windings are connected in Y with a solidly grounded neutral. Draw the per-unit zero-, positive-, and negative-sequence networks if the low-voltage wind- ings are connected: (a) in D with American standard phase shift
A three phase, 25-hp, 440-V, 60-Hz, 1750 rpm, wound-rotor induction motor has the following equivalent circuit parameters: R1=0.20 ohms, X1=1.0 ohms, R2=0.15 ohms, X2=0.8 ohms, Xm=30 ohms. The motor is connected to a three phase, 440-V, 60-Hz supply.
1) Determine the transfer of second-order highpass filter with a cutoff frequency of 900 Hz and passband gain of 1 using a butterworth type. 2) Design a filter for your transfer function from question.1 using the sallen-Key topology.
Many hallway and some room lights are wired so that they may be controlled from either end of the hall or room. This is called a two-way or three-way switch (references vary). Explain why this is equivalent in operation to an XOR gate.
In the lucky drift model for impact ionization, it is assumed that some lucky carriers are accelerated ballistically (i.e. without scattering) to energies above threshold, causing impact ionization. Assume that average relaxation time is 0.05 ps.
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