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Electrical Fundamentals
1. An aircraft company has decided to replace the copper cables to the main aircraft generators onboard it's Boeing 747s with aluminium cables that are capable of carrying the same current.
a. Describe the effects on the cable with the aircraft at sea level compared to 35,000 feet. Like coefficient of expansion at sea level and on 35,000 feet, resistivity.
2. A parallel plate capacitor was originally constructed using air as the dielectric. For another application, we need to change the dielectric to Mica.
a. Describe fully how this change of dielectric material has affected the capacitor in ALL respects.
Write a short note on dispersion shifted and dispersion flatted fibers? The dispersion features of a fiber is display below: The overall dispersion is the sum of materi
A 100-kW, 230-V shunt generator has R a = 0.05 and R f = 57.5 . If the generator operates at rated voltage, calculate the induced voltage at (a) full load, and (b) one-half fu
Q. Explain Time-Dependent Circuit Analysis? The response of networks to time-varying sources is considered in this chapter. The special case of sinusoidal signals is of particu
Q. Draw the various characterstics of a DC shunt generator and explain critical resistance. Sol. Following are three most important characterstics or curves of a d.
Q. What do you mean by Time consistent Busy Hour? (i) Busy Hour (ii) Peak Busy Hour (iv) Time consistent Busy Hour (v) Traffic intensity Ans: (i) Busy Hour: C
In practice, it is usually better to wind the field coils on the rotor and supply the field current to them via slip rings. As the rotor turns, the changing magnetic field expe
Q. Show Process of Power transmission and distribution? The structure of a power system can be divided into generation (G), transmission, (T), and distribution (D) facilities,
Question: a) Differentiate between Asynchronous message passing and Synchronous-message passing. b) If keyboards are the predominant means of interface to human input, the
The frequency of an oscillator may be measured by an oscilloscope with a callbrated time base(True/False)
Q. Discuss the closed-loop behavior? Consider an elementary feedback control system, as shown in Figure, with H = 1. The output variable c and the input e to the direct transmi
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