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Q. The following data were obtained on a 25- kVA, 2400:240-V, 60-Hz, single-phase distribution transformer:
• Open-circuit test with meters on LV side: 240 V, 3.2 A, 165 W
• Short-circuit test with meters on HV side: 55 V, 10.4 A, 375 W
Compute the worst voltage regulation and the power factor at which it occurs, when the transformer is delivering rated output at rated secondary terminal voltage of 240 V. Sketch the corresponding phasor diagram.
Q. How can a JFET be used as a voltage controlled resistor. Explain from drain characteristics? The region to the left of the pinch off locus is referred to as the ohmic region
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Question: (a) The forward path transfer function of a unity feedback control system is given by: (i) Draw the labelled block diagram representation of the control system.
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