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Q. What do you understand by common control?
In some switching systems, control subsystem may be an integral part of switching network itself. Such system iscalled direct control switching systems. Those systems in which control subsystem is outside switching network are called common control switching system. Stronger exchanges are generally direct control systems while crossbar and electronic exchanges are common control system. All stored program control systems are common control systems. Common control is also called register control orindirect control.
(a) Evaluate whether the sinusoidal signal x(t) = A cos (2πf 0 t + θ) is an energy-type or a power-type signal. (b) Show that any periodic signal is not typically energy type, a
2. A 6 pole lap-wound armature having 720 conductors, rotates in a field of 20.35 mWb. (a) If the induced current is 72 A, what is the torque developed by armature? (b) If the indu
Q. In the magnetic circuit shown in Figure the center leg has the same cross-sectional area as each of the outer legs. The coil has 400 turns. The permeability of iron may
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The energy consumption for a small factory is given at the end of the brief. a) Three commercial tariffs from an energy supplier are shown below. Using these (or other commercia
Q. What is Polyphase Induction Machine Performance? Some of the important steady-state performance characteristics of a polyphase induction motor include the variation of curre
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Q. When the quantum step size δv and the step size of f (t) are the same as in , the quantizer is said to have a gain of unity. If, on the other hand, the quantizer has a gain of K
The increase in the current is building up the magnetic field surrounding the coil. Energy is stored in that field. Consider the energy supplied by the voltage source during the
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