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1. Why is it desirable to short circuit the dc field when a synchronous motor is started?
2. Briefly describe the phenomenon of "hunting" in a synchronous motor. How is it rectified?
3. Explain briefly the process of synchronizing a synchronous motor to the bus-bars. What conditions determine the instant of synchronization?
What is the most important consideration in choosing a type of capacitor?
Write a program to find the sum of the elements of an array called list1. The size of list1 is four bytes. The values of list1 are $FF, $1, $FE, and $02. To check your work, the sum should become $0200. The requirements for writing this program ar..
Design an NMOS inverter with resistor load to have an average propagation delay of 2.5 ns with a capacitive load of 1 pF by scaling the reference inverter based upon the results in Table 6.9. What is the average power dissipation of this gate with..
Describe one practical application that uses an adder - What is a major advantage of using two's complement subtraction?
A 4.12 kV, 60 Hz, 3000-hp 0.8-PF-leading, Δ-connected, three- phase synchronous motor has a synchronous reactance of 1.1 per unit and an armature re at rated voltage with a line current of 300 A at 0.85 PF leading, what is the internal generated v..
If the system is released from rest, determine the velocity of block A after it has moved 2m. Assume that the coefficient of kinetic friction between block A and the plane is 0.25 and that the pulley is weightless frictionless.
What is the current in the resistor in each circuit? (Hint: The equivalent circuits for the transport model equations may help in visualizing the circuit.)
Write the expression for the current through the capacitor after the switch is closed. The circuit is a 60 Volt circuit
In a series circuit with a 25 V source, there are three resistors. One voltage drop is 5 V, and the other is 10 V. What is the value of the third voltage drop?
Calculate and plot the noise figure of this line as its physical temperature ranges from T = 0 K to 1000 K, for F0 = 1 Db and for F0 = 3 dB.
A ring charge has charge density ρl = ksin(φ) .It is placed on the xy-plane, centered at the origin, and has a radius of 2. (i) Find the electric field intensity E at (0, 0, h) (ii) Find the electric potential V at (0, 0, h)
A rectangular waveguide with dimensions a=2b=5cm operates at11 GHz. Assuming that the guide is filled with air, find the highest possible operating mode and the intrinsic wave impedance at that mode.
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