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An induction load consisting of a bank of induction motors consumes 50 kW at a power factor of 0.8 lagging from a 220-V (rms), 60-Hz single phase source. By placing a bank of capacitors in parallel with the load, the resultant power factor is to be raised to 0.95 lagging. Find the required capacitance in μF.
A rectangular loop of wire containing a high resistance voltmeter has corners initially at (a/2, b/2, 0), (-a/2, b/2, 0), (-a/2, -b/2, 0) and (a/2,-b/2, 0). The loop begins to rotate about the x axis at constant angular velocity w.
Assume white Gaussian noise of zero means and power spectral density No/2 is added to the signal at the receiver input. Find the expression for SNRout (SNR at the output of the receiver)
a. Plot the spectra of X(w) = t sinc(wt/2). Let t = 1 and -20 =
A proportional controller for a rotating antenna has a gain of Kp of 5 in-oz/deg. The antenna was initially pointing south, but was then commanded to point southeast. Find the torque applied to the antenna in in-oz, when the antenna is within 5° o..
The temperature decreases by 33.8 C°. Determine the fractional decrease L/(LSilver + LGold) in the rod's length, where LSilver and LGold are the initial lengths of the silver and gold rods.
Suppose you want to use external components to configure a comparator in order to provide hysteresis for the input. Show how you would configure such a comparator with hysteresis input.
Discuss different applications that could use non-inverting and inverting amplifier circuits. Will the actual op amp characteristics cause any challenges if used for each application What effect will high source resistance have on your output volta..
design op amp circuit to produce output vout which is related to inputs v1, v2 and v3 by expression vout= -(3v1+5v2+8v3). assume max permitted resistor value= 200k. use only one op amp
a.) What isthe minimum sampling frequency to avoid aliasing b.)If the sampling frequency of fs=2500 samples/sec is used how many samples must be taken to give a frequency resolution of 10Hz
A particular intrinsic semiconductor has a resistivity of 50 -cm at T=300 K and 5 - cm at T=330 K. Neglecting the change in mobility and effective density of states with temperature, determine the bandgap energy of the semiconductor.
A DC motor has the following characteristics. Rating: 35kW Operation: 350 V, draws 90A, operates at a speed of 1100 rev/min when supplying full load. Shunt: Field resistance is 150 Ohm and armature resistance is 0.5 Ohm
A modulating signal consists of two sinusoidal components: 1 kHz and 3 kHz. The transmitter carrier frequency is 80 kHz. Assume in a SSB-USB modulated signal that the inserted carrier at the receiver is 200 Hz too high. Indicate the frequencies of..
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