A.C Fundamentals, Circuits And Circuit Theory MCQ Questions & Answers

A.C Fundamentals, Circuits And Circuit Theory MCQ Questions & Answers | Electrical Engineering

Learn A.C Fundamentals, Circuits And Circuit Theory MCQ questions & answers are available for a Electrical Engineering students to clear GATE exams, various technical interview, competitive examination, and another entrance exam. A.C Fundamentals, Circuits And Circuit Theory MCQ question is the important chapter for a Electrical Engineering and GATE students. Page-1 section-2

For a sine wave with peak value Emax ___________ 8.30. the average value is

A) 0.636 Emax B) 0.707 Emax C) 0.434 EWc D) lAUEmax

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Answer & Solution

Answer: Option A

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Ohm is unit of all of the following except

A) Inductive reactance B) Capacitive reactance C) Resistance D) Capacitance

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Answer & Solution

Answer: Option D

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If resistance is 20 ohms. and inductance is 27 in a R-L series circuit, then time constant of this circuit will be

A) 0.001 s B) 0.1 s C) 10 s D) 100 s

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Answer & Solution

Answer: Option B

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In a loss-free R-L-C circuit the transient current is

A) Oscillating B) Square wave C) Sinusoidal D) Non-oscillating

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Answer & Solution

Answer: Option C

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Wire-wound resistors are unsuitable for use at high frequencies because they

A) Create more electrical noise B) Are likely to melt under excessive eddy current heat C) Consume more power D) Exhibit unwanted inductive and capacitive effects

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Answer & Solution

Answer: Option D

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The series and parallel resonance on L-C circuit' differs in that

A) Series resistance needs a low-resistance source for sharp rise in current B) Series resonance needs a high-resistance source for sharp increase in current C) Parallel resonance needs a low-resistance source for a sharp increase in impedance D) Parallel resonance needs a low-resistance source for a sharp rise in line current

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Answer & Solution

Answer: Option A

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At very low frequencies a series R-C circuit behaves as almost purely

A) Resistive B) Inductive C) Capacitive D) None of the above

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Answer & Solution

Answer: Option C

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In an A.C. circuit power is dissipated in

A) Resistance only B) Inductance only C) Capacitance only D) None of the above

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Answer & Solution

Answer: Option A

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The input of an A.C. circuit having power factor of 0.8 lagging is 40 kVA
The power drawn by the circuit is

A) 12 kW B) 22 kW C) 32 kW D) 64 kW

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Answer & Solution

Answer: Option C

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