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an 8 pole synchronous motor produces a full load torque of 25 foot pounds, fed from a 60hz source and is now operating at 60% eff. What is the energy cost if the motor ran for a 8000 hrs/yr and the electrical energy cost were $.09/kWh.
Assume a Hertzian dipole antenna model. (a) Calculate the antenna radiation resistance and Ohmic resistance, (b) Calculate the radiation efficiency of this antenna, (c) Calculate the input impedance, (d) calculate the antenna gain
Compute the unit-pulse response h[n] for the discrete-time system y[n+2]2y[n+1]+y[n]=x[n] (for n = 0, 1, 2, 3).
A separately excited DC generator rated at 125V has an armature resistance of 0.75 ohms and a no load coltage of 140 VDC. What will the armature voltage will be at rated load
The function f(t) is given as f(t) = [cost] -infinity
from the following data: 6.28 7.06 6.50 6.76 6.82 6.92 6.86 7.15 6.57 6.48 6.64 6.94 6.49 7.14 7.16 7.10 7.08 6.48 6.40 6.54 A. find the mean and the median B. Find the variance and standard deviation
The voltage across the terminals of a certain circuit and the current entering into its (+) voltage terminal are given by: v = 4 + 12 Cos[377 t + 60 Degree] - 6 Cos[754 t - 30 Degree] i = 5 + 10 Cos[377 t + 45 Degree] + 2 Cos[754 t + 15 Degree] What ..
A three phase Y-connected induction motor operates at 220 volts, has a power factor of 75% and an efficiency of 84% when delivering 8HP. a) what is the current in any one of the phase windings
Write a C-program to generate K-map row and column headings for an arbitrary number of row or column input variables, i.e. 4x4 k-map for 2 row and 2 column variables, 16x16 k-map for 4 row and 4 column variables, etc.
Suppose you are designing a power amplifier for a loudspeaker which has an equivalent resistance of 150 . What should be the Thevenin equivalent resistance of the power amplifier in order to maximize the power transfer to the loudspeaker
A certain power amplifier with crossover distortion has the input/output voltage relationship vo (t) = vi (t)3 (2.39) a) Use example voltage values to show that this does not satisfy the relationship. b) Let vi (t) = sin (pi t) .
What Boolean logic process could be used to convert the binary form of all decimal digits to the hexadecimal representation of its ASCII character (ex.; 00001000 converted to 00111000 OR $8 converted to $38)
When disconnected and fully charged, the voltage across the battery terminals is measured to be 13.8 V. When connected to a load that dissipates 18 W of power, the terminal voltage of the battery decreases to 12 V.
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