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Draw and explain the phasor diagram of 3-phase alternator with unity and lagging power factor load.
Derive the equation of electromagnetic torque for a three phase induction motor. Also obtain the condition for maximum torque.
Explain double field revolving theory for single phase Induction Motor.
Explain necessity of starters in three induction motor also draw and explain auto transformer starter in detail.
List out different methods of speed control of Induction Motor. Explain any one in detail.
Give comparison between salient pole and cylindrical type alternator
Following test results are obtained from a 3 phase, 6000 kVA,6600V,star connected,2 pole,50 Hz turbo alternator: With a field current of 125 A, the open circuit voltage is 8000 V at the rated speed; with the same field current and rated speed, the short circuit current is 800 A. At the rated full load, the resistance drop is 3%. Find the regulation of the alternator on full load and at a power factor of 0.8 lagging. Draw vector diagram for lagging load.
Explain construction and working of shaded pole single phase motor.
Define voltage regulation and explain zero power factor method in case of an alternator.
State advantages and applications of linear induction motor
What is synchronizing of an alternator? Explain all dark lamp method in detail.
State the conditions to be satisfied for parallel operation of 3 phase alternators.
A synchronous motor absorbing 60 kW is connected in parallel with a factory load of 240 kW, having 0.8 lagging power factor. If the combined load has 0.9 lagging power factor, what value of leading KVAR will be supplied by synchronous motor & at what power factor is it working?
Explain synchronous condenser and synchronous phase modifiers.
Discuss working and applications of Permanent magnet brushless DC motor
Explain slip test for measurement of direct and quadrature axis reactance for salient pole machine.
Explain construction, working and advantages and disadvantages of switched reluctance motor.
Questions repeat across sessions. Working through two or three papers shows you which topics GTU asks most.
BE Electrical
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Official Gujarat Technological University (GTU) examination paper for Electrical Machine- II (Winter 2025, B.E. · Electrical Engineering, Sem 5). Features complete 70-mark regular & remedial examination pattern, official marking distribution across all 5 questions, and direct 1-click official PDF download.
Transcribed for student exam preparation from Gujarat Technological University official examination archives. Questions, syllabus guidelines, and curriculum marking schemes remain the intellectual property of Gujarat Technological University.
3150910 Electrical Machine- II
Official GTU PDF · Winter 2025
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