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A three-phase, 60 Hz induction motor run at 1720 RPM and the following losses are known: stator copper loss =50 watts, rotor copper loss = 65 watts, combined rotational loss = 85 watts. Determine the following a) Number of poles (4-pole) b) slip (4.44%) c) Air-gap Power (1,464 watts) d) Output power (1,314 watts) e) Input power (1,514 watts) f) Efficiency (86.8%) g) Output Torque (7.3 N-m) h) Apparent power if the power factor is 0.85 Lag (1,781 VA)
q.no3show that the current through two transistors in series is equal to the current through a single transistor of
A special external data signal (DATA_READY) is asserted whenever each of the bits for X are available. In addition, another special signal (ENCODE) is asserted during the transmission of the data X indicating whether 2X+3 or 3X+1 should be compute..
The coils on the rotor, 10 turns per coil, are connected in series through the slip rings so that at any instance of time there are 5 coil sides under each pole. What is the dc voltage from a full wave rectifier if this rotates at 1000 rpm
An output pulse of 5μs duration is to be generated by a 74LS122 one-shot. Using a capacitor of 10,000 pF, determine the value of external resistance required.
The donor concentration in a silicon sample at 300K is ND = 1.2 x 1015 cm-3. 1 x 1016 cm-3 acceptor atoms are added to form a compensated p-type semiconductor so that the Fermi level is 0.26 eV above the valence band edge.
An electric heating element is connected to a 110 v circuit and a current of 3.2 A is flowing through the element. How much energy is used up during a period
the signal shown below is a sine wave as it might be displayed on an oscilloscope. If it takes 40 msec. for the waveform to travel between the points shown by the arrow "B" below, what is the frequency of the waveform
Determine for each of following 4 signals if it is bandlimited and, if yes, find the minimum sampling rate without causing aliasing. (a) x1(t) = cos(500pt) + sin(700pt); (b) x2(t) = sin2(50pt);
Design a one-op-amp high-pass filter with a gain of 20 and a cornerfrequency of 0.05Hz. Calculate its response to a step input of1mV.
A solar pond consists of a thin layer of fresh water floating on top of a denser layer of salt water. When the salty layer absorbs sunlight it warms up and much of that heat is held there by the insulating effect of the fresh water above it
Use Gauss's law to obtainexpressions for the electric field intensity E in both regions: r> a and r
design a combinational circuit that takes two 3-bit binary numbers a2a1a0 and b2b1b0 and generates modulo- 8 addition.
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