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A NEMA design B, 3-phase, 60 Hz, Induction motor is rated: 60 HP, 460V, 71A, 93.0% efficiency, NEMA code G, 1180 RPM:
A. What is the power factor of the motor?
B. What is power factor of the motor when operating at 1/2 load?
Assume the reative power is the same as the in part (a) and that the efficiency is still 93 %.
C. How many poles does this motor have?
Determine the Voltage across the electrical model of a cell membrane in a nerve cell
3) If the input voltage to a Full-Wave Bridge Peak Rectifier is vi(t) = 10.4sin(600t) Volts, what is the peak output voltage. Assume all diodes have a 0.7V drop, (ie. VD = 0.7V). 4) For the previous problem, if the resistor in the circuit is equal t..
A certain lightbulb has a tungsten filament with a resistance of 21.9 when at 20.0°C and 145 when hot. Assume the resistivity of tungsten varies linearly with temperature even over the large temperature range involved here.
A 150 MVA, 24 kV, 123% three-phase synchronous generator supplies a large network. The network voltage is 27 kV. The generator operates with an induced voltage, which is twice the rated line-to-neutral voltage.
What is the smallest number of samples that could be collected in order to know for sure whether or not the 1000Hz component is present? Assume you are using a Rectangular window.
A unipolar 16 bit ADC measures 0 - 10 volts full scale. What is the minimum resolvable voltage What is the percent quantization error What is the percent quantization error if a 1 volt max signal is input
What are the techniques used to make feedback system stable? Explain and draw the frequency response of a 1-pole feedback amplifier.
Design a 4-bit decrementer using Half-adders and inverters as building blocks. The circuits impleents A-1=S. Draw the circuit diagram. Hint: consider addtion of the 2s complement of -1 =1111. Begin with a 4-bit adder circuit constructed with 1-bit..
A micrometer caliper is used to measure the diameter of a bolt and a reading of 0.768 inches is obtained. Based on this measurement, find the smallest possible diameter and the largest possible diameter.
The sun is at an altitude of 30 degrees to the horizontal. What is the corresponding air mass What is the physical significance of air mass Mars has a very thin atmosphere containing primarily CO_2 and dust particles.
A generator is rated at 500 MVA (three phase) and 22 kV (line-to-line). Its Y-connected windings have a reactance of 1.1 per unit. Find the ohmic value of the reactance of the windings. What is the per unit value if we change the base to 200 MVA a..
An input signal of 10V at 0o and a frequency of 1592 Hz is applied to a series RLC circuit with resistor R = 100 ohm, inductor L = 40 mH, and capacitor C = 0.5 F. The value of the total circuit complex impedance is
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