Electrical Engineering
GATE EE topic:electrical-machines PYQs
Build your understanding with focused practice from past exam papers.
Questions 531–540 of 715. Imported answers require independent review unless marked reviewed.
Question 1
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A single-phase 100 kVA, 100 V / 100 V, 50 Hz transformer has a voltage drop of 5% across its series impedance at full load. Of this, 3% is due to resistance. The percentage regulation of the transformer at full load with 0.8 lagging power factor is
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In a salient pole synchronous motor, the developed reluctance torque attains the maximum value when the load angle in electrical degrees is
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A single phase fully controlled rectifier is supplying a load with an anti-parallel diode as shown in the figure. All switches and diodes are ideal. Which one of the following is true for instantaneous load voltage and current?
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Four power semiconductor devices are shown in the figure along with their relevant terminals. The device(s) that can carry dc current continuously in the direction shown when gated appropriately is (are)
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Two wattmeter method is used for measurement of power in a balanced three-phase load supplied from a balanced three-phase system. If one of the watmeters reads half of the other (both positive), then the power factor of the load is
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Consider a lossy transmission line with
and
as the sending and receiving end voltages, respectively.
and
are the series impedance and reactance of the line, respectively. The steady-state stability limit for the transmission line will beYour answerChoose one option.
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The graph of a network has 8 nodes and 5 independent loops. The number of branches of the graph is
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In the figure, the voltages are
,
and
. The circuit is in sinusoidal steady state, and
.
,
and
are the average power outputs. Which one of the following statements is true? 
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Match the transfer functions of the second-order systems with the nature of the systems given below.
Transfer functions:
P:
Q:
R:
Nature of system:
I: Overdamped
II: Critically damped
III: Underdamped
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A positive charge of 1 nC is placed at (0, 0, 0.2) where all dimensions are in metres. Consider the x-y plane to be a conducting ground plane. Take
F/m. The Z component of the E field at (0, 0, 0.1) is closest toYour answerChoose one option.
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