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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).
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Input Characteristics Transistors can be operated in the switching mode. If base current IB is zero transistor is in an ON state behaves as a switch. If the base cur
Ask question #Minimum 100 words accepted how does the charge plate relate to the movement of electrons
Q. What is meant by armature reaction. Explain briefly the bad effects of armature reactions. Sol. By armature reaction is meant the effect of magnetic field set up
a) Write a program that will read and show the analog voltage on pin PE7 approximately once every second. b) Write a program that will read and show in decivolts the analog volt
Q. For the configurations of the coupled coils shown in Figure, obtain the voltage equations for v 1 and v 2 .
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Redraw the Wheat stone bridge circuit of Figure and show that Equation holds good for the null condition when the meter A reads zero current.
(a) Now consider a typical open-wire transmission line with parameters of R = 14 /mi, L = 4.6 mH/mi, C = 0.01 µF/mi, and G = 0.3×10 -6 S/mi. If the line operates at 1 kHz, find t
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