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A 9-kVA, 208 V, 1200-rpm, three phase, 60 Hz, Y- connected, Synchronous generator has field winding resistance of 4.5ohm. The armature winding impedance is 0.3+j5 ohms per phase. When the generator operates at its full load and 0.8 lagging, the field winding current is 5A. The rotation loss is 500W.a. Determine the voltage regulationb. Determine the efficiency of the generator.c. The torque applied by the primer mover.
State briefly the consequences of opening the secondary of a current transformer when it is in service. State the precaution to be taken should disconnection be necessary.
A low pass filter has a cut-off frequency of 8kHz and a high pass filter has a cut-off frequency of 5kHz. These two circuits are connected back to back in cascade to form an input-output system.
(a) list the minterms and maxterms of each function (b) list the minterms of ~E and then ~F (c) list the miinterms of E+F and then E.F (d) express E and then F in sum-of-minterms algebraic forms
What is the maximum data rate possible for a standard telephone circuit with an SNR of 1023 and BW of 3 KHz using 8 bits per symbol
How tall must the antennas be if the link operates on a frequency of 2.450Ghz, D1=5miles, D2=11miles, and the obstruction is 60 feet high?
A Y-connected load has an impedance of 25+j12 ohms in each phase. It is desired to raise the load power factor to .95 lagging. (a) What size capacitor should be placed in parallel with each phase impedance if frequence = 60 Hz
Two ideal p-n junction diodes are connected in series across a 1 V battery such that both of them are forward biased (draw this). One diode has I0 = 10-5 A and another I0 = 10-8 A.
A standard silicon NPN BJT is to be used as an amplifier. The emitter voltage is biased at 4 volts, the base is biased at 5 volts, and the collector is biased at 10 volts. Will this circuit perform as desired? Why or why not.
A negative unity feedback loop with input R(s), output Y(s) and error E(s) is placed around the system \(H(s)=1/((s+p_{1})(s+p_{2})...(s+p_{q}))\)(a) Find the transfer function E(s)/R(s).
At a point f in the system, there is an open-circuit fault on phase-a with a voltage across the open-circuit as Vfa , whereas Vfb =Vfc =0. Similar to the calculations of the short-circuit currents by making use of the sequence networks
Draw the equivalent circuit referred to the high-voltage side.
An op amp with an open-loop gain of 6x10^5 and Vcc = 10V has an output voltage of 3V. If the voltage at the inverting input is -1 μV, what is the magnitude of the noninverting-input voltage
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