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Voltage and current measurement taken for a 3- phase Wye- connected alternator indicate a line voltage of 208 V and a line current of 20 A. What is the value of the phase voltage and phase current?
A 480V, 60 Hz three phase induction motor has the following parameters: R1=R' 2= .3 ohms Xeq= 1 ohm Xc=600 ohms At full load, the motor speed is 1120 rpm, the rotational loss is 400W and the core loss is 1 kW.
If the voltage across the current through the series combination ofa resistance and an unknown energy-storage element are v =200cos(10^(2)t + 60°) V and i = 5.547cos(10^(2)t + 93.69°)mA,
The controlled variable in a closed-loop system is the direction of a robot arm. Initially, it is at 50o; then it is commanded to go to 15o. When the error is 10o for the first time, what is direction of the robot arm
if a circuit contains 3 automatic switches and we want that, with a probability of 95%, during a given time interval they are all working, what probability of failure per time interval can we admit for a single switch
A chopper controlled electric train is powered from a 1500 VDE supply. The power semi- conductor switch element hasaminimum effectice ON time of 40 Ms. during starting and slowspeed running, the output of the chopper has to go as low as 15 V.
What is the difference between serial andparallel transfer. how to convert serial data to parallel andparallel data to serial. What type of register is needed.
A constellation diagram has two points located at (3,0) and (-3,0) on the I(in-phase)-Q(quadrature phase) plane. Find the value of peak amplitude and the type of modulation this diagram represents.
A stepper motor is being used to move a crane. The motor has the following properties: Holding torque = 2 m.kg, dynamic torque = 1.5 m.kg, and detent torque = 0.5 m.kg. Through a 1:5 gear, the motor (motor connected to the smaller gear)
discuss the difference(s) and similarity(ies) between the modulations index used in AM and the modulation index used in FM What are the practical interpretations
Design a noninverting amplifier with gain of 20. Maxium opamp output current of 0.5 mA should occur for maximum outputvoltage of 8 V.
A Si sample contains 1016 cm-3 In acceptoratoms and a certain number of shallow donors. The In acceptorlevel is 0.16eV above Ev, and EF is 0.26eVabove Ev at 300K. How many (cm-3) In atoms are un-ionized (i.e., neutral)
design an n-channel silicon JFET with pinch off voltage (-2V). The channel is doped with Arsenic and the gate is doped with Boron. the Boron density is 1019 atoms /cm-3 all atoms are fully ionized. The resistance of the channel at zero gate bias i..
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