GATE EE format:nat PYQs & Answers — Page 17 — Exam Papers

Questions 161–170 of 256. Imported answers require independent review unless marked reviewed.

Topic practice 256 questionsPage 17 of 26

A co-axial cylindrical capacitor shown in Figure (i) has dielectric with relative permittivity

. When one-fourth portion of the dielectric is replaced with another dielectric of relative permittivity

as shown in Figure (ii), the capacitance is doubled. The value of

is ________.

Diagram for Electrical Engineering question 20

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The

matrix of a two-bus power system having two identical parallel lines connected between them in pu is given as

The magnitude of the series reactance of each line in pu (round off up to one decimal place) is __________.

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Five alternators each rated 5 MVA, 13.2 kV with 25% of reactance on its own base are connected in parallel to a busbar. The short-circuit level in MVA at the bus is___________.

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The total impedance of the secondary winding, leads, and burden of a 5 A CT is 0.01

. If the fault current is 20 times the rated primary current of the CT, the VA output of the CT is __________.

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The rank of the matrix,

, is __________.

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The output voltage of a single-phase full bridge voltage source inverter is controlled by unipolar PWM with one pulse per half cycle. For the fundamental rms component of output voltage to be 75% of DC voltage, the required pulse width in degrees (round off up to one decimal place) is __________.

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If

and

, then

at

is __________.

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The probability of a resistor being defective is 0.02. There are 50 such resistors in a circuit. The probability of two or more defective resistors in the circuit (round off to two decimal places) is __________.

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A 0.1 μF capacitor charged to 100 V is discharged through a 1 kΩ resistor. The time in ms (round off to two decimal places) required for the voltage across the capacitor to drop to 1 V is ____________.

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The current

flowing in the circuit shown below in amperes is __________.

Diagram for Electrical Engineering question 42

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