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Q. Consider an elementary three-phase, four-pole alternator with a wye-connected armature winding, consisting of full-pitch concentrated coils. Each phase
coil has three turns, and all the turns in any one phase are connected in series. The flux per pole, distributed sinusoidally in space, is 0.1 Wb. The rotor is driven at 1800 r/min.
(a) Calculate the rms voltage generated in each phase.
(b) If a voltmeter were connected across the two line terminals, what would it read?
(c) For the a-b-c phase sequence, take t = 0at the instant when the flux linkages with the a-phase are maximum.
(i) Express the three phase voltages as functions of time.
(ii) Draw a corresponding phasor diagram of these voltages with the a-phase voltage as reference.
(iii) Represent the line-to-line voltages on the phasor diagram in part (ii).
Draw layout of hydro-electric power plant and illustrate it briefly. Explain the following: a. Types of power plants b. Selection of power Plants
Design : Rather than 100 two-motion selectors as in the case of Design 3, let's consider only 24 two-motion selectors. In the case 24 simultaneous calls can be put through the swi
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(a) Consider a 5-µH inductor to which a current source i(t) is attached, as shown in Figure (b). Sketch the inductor voltage and stored energy as a function of time. (b) Let a v
how the interrupts are affected by system rest
Q. Draw the circuit of a common drain FET amplifier and explain. FET amplifier circuit The weak signal is applied between gate and source and amplified output is obtained
What are the modes used in display modes? 1. Left Entry mode In the left entry mode, the data is going into from the left side of the display unit. 2. Right Entry Mode
When sizing wire, one of the most difficult tasks is to calculate the electrical load that will be present on the conductors. How do you decide what size wire to use? What two fact
Consider the circuit of Figure (a) and obtain the complete solution for the voltage v C (t) across the 5-F capacitor and the voltage v x (t) across the 5- resistor.
Specific Core Indicators Method This technique emphasizes to assign the responsibility and create the accountability. It is possible in which for any of the main indicators, t
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