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A short circuit test on the transformer at rated current yields a wattmeter reading of 96W, and an open circuit yields a wattmeter reading of 24W. what is the transformer's efficiency when delivering the full, rated output of 5kVA at power factor of 0.8.
Find a minimum two level circuit (corresponding to the sum of products expressions) using AND and one OR gate per function for each of the following sets of functions: f(a,b,c,d) =fm(1,3,5,8,9,10,13,14) g(a,b,c,d) =fm(4,5,6,7,10,13,14)
Some of this is due to high frequency effects, and some is due to the relationship of the wavelength of the signal being set over the wire to the length of the conductor. describe both of these limitations and their effects
A 10kW, 230V, 50 Hz, three-phase induction motor has full-loadefficiency of 86%, and power factor of 88%. It is supplied by a three-core cable 100mlong, having conductors of cross sectional area 16 mm^2 andresistivity 17.2nΩ m.
Compute the DFT of the first 4096 points of the noise and plot the noise's DFT magnitude in dB vs. frequency. Notice that the noise DFT magnitude is "flat" (well, it is quite ragged, but the top of the plot is flat), which is why this kind of nois..
In an AC generator the magnetic field is .05T, the number of loops is 12, the operating temperature is 90degC, the rotational speed is 50cps, the power factor is .96 leading and the are enclosed by one loop is 2 sqft.
A 120V(rms), variable-frequency source is connected in series with a 100Ω resistor and 100μF Capacitor. Find the input power to the circuit from the source at the frequency where the power factor of thr load is 0.75.
Suppose we want to construct an amplifier with a closed-loop gain of 50. We want the gain to vary by no more than +/- 5% while the open-loop gain varies by +/- 50%. Determine the values for a and b that will satisfy these constraints.
A 3-phase synchronous generator rated at 75 MVA,13.8 kV (L-L) is connected to a power system that has a Theveninequivalent of j0.23 per unit at 1.0 per unit voltage. The synchronous reactance of the generator is j1.35 per unit.
The initial voltage across the capacitor, defined using the passive sign convention in terms of the current i , is 4.5 V. (a) Write the time domain integral equation that arises from application of KVL. (b) By first solving for I(s), determine the..
Consider the first-order linear differential equation y(t) + 5 (dy(t) / dt) = x(t) Compute the zero-input response (general solution of the homogeneous equation) to find the system-specific part of the response
Two statistically independent random variables, X and Y, have variances of sigma^2 (X) =9 and sigma^2(Y) =25. Two new random variables are defined as: U = 3X + 4Y V = 5X - 2Y (a) Find the variances of U and V.
Find the Eb/no ratio in dB for a system operating at 10Mbps in a BW of 1MHz. the un-modulated carrier power is 0.1pW and the system noise temperature is 120 degrees Kelvin.
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