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A three-phase, 50-hp, 440-V, 60-Hz, four-pole, wound-rotor inductionmotor operates at a slip of 0.03 at full load,with its slip rings short-circuited. The motor is capable of developing a maximum torque of two times the full-load torque at rated voltage and frequency. The rotor resistance per phase referred to the stator is 0.1 . Neglect the stator resistance and rotational and stray-load losses. Find the rotor copper loss at full load and the speed atmaximumtorque.Compute the value of the per-phase rotor resistance (referred to the stator) that must be added in series to produce a starting torque equal to the maximum torque.
Find a minimum two level, multiple-output AND-OR gate circuit to realize these functions (eight gates minimum). F 1 (a,b,c,d) =Σm(10,11,12,15) +D (4,8,14) F 2 (a,b,c,d) =Σm(4
Give the properties and application of PVC. Polyvinylchloride (PVC): It is replacing rubber to a great extent in veracious applications. There is PVC insulated (non-sheathed)
Q. Can you explain Noninverting Amplifier? It is called "noninverting" because there is no sign inversion. A typical circuit is shown in Figure. With a finite op-amp gain Ao,
Q. Figure gives the frequency-response graphs for a 709 op amp. Choose compensating components for the circuit to have a gain of 100 and a frequency response of up to 100 kHz.
Q. A 300-kVA transformer has a core loss of 1.5 kW and a full-load copper loss of 4.5 kW. (a) Calculate its efficiency corresponding to 25, 50, 75, 100, and 125% loads at unity
Example of high resistivity material is (A) Nichrome (B) Silver (C) Gold (D) Copper Ans: Nichrome is example of high resistivity
Stratos Corporation is a privately held tablet semiconductor technology firm with bright growth prospects.The past 5 years have seen the firm evolve from a pure startup to a profit
How to plot output power Vs load resistor graph using PSpice softwaer for half wave rectifier circuit
Linearize the swing equations around an equilibrium point. Compute the transfer function from the input U to the output !. For which equilibria is the linearizes system stabl
Q. Consider the circuit shown in Figure. Determine the current in the diode by assuming: (a) The diode is ideal. (b) The diode is to be represented by the model of Figure 7.2
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