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

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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-3 section-1

Each section contains 100 MCQs on A.C Fundamentals, Circuits and Circuit Theory .

All the rules and laws of D.C. circuit also apply to A.C. circuit containing

A) Capacitance only B) Inductance only C) Resistance only D) All above

Discuss

Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

The equation of 50 Hz current sine wave having r.m.s. value of 60 A is

A) 60 sin 25 t B) 60 sin 50 t C) 84.84 sin 3141 D) 42.42 sin 314 t

Discuss

Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

In a pure inductive circuit if the supply frequency is reduced to $$\frac{1}{2},\,$$ the current will

A) Be reduced by half B) Be doubled C) Be four times as high D) Be reduced to one fourth

Discuss

Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

In a pure capacitive circuit if the supply frequency is reduced to $$\frac{1}{2},\,$$ the current will

A) Be reduced by half B) Be doubled C) Be four times at high D) Be reduced to one fourth

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

A sine wave has a frequency of 50 Hz. Its angular frequency is __________ radian/second.

A) 100 n B) 50 jt C) 25 JT D) 5 n

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Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

Skin effect occurs when a conductor carries current at _________ frequencies.

A) Very low B) Low C) Medium D) High

Discuss

Answer & Solution

Answer: Option D

No explanation is given for this question. Let's Discuss on Board

In a parallel R-C circuit, the current always _________the applied voltage

A) Lags B) Leads C) Remains in phase with D) None of the above

Discuss

Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

A pure capacitor connected across an A.C. voltage consumed 50 W. This is due to

A) The capacitive reactance in ohms B) The current flowing in capacitor C) The size of the capacitor being quite big D) The statement is incorrect

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Answer & Solution

Answer: Option D

No explanation is given for this question. Let's Discuss on Board

Time constant of a capacitive circuit

A) Increases with the decrease of capacitance and decrease of resistance B) Increases with the decrease of capacitance and increase of resistance C) Increases with the increase of capacitance and decrease of resistance D) Increase with increase of capacitance and increase of resistance

Discuss

Answer & Solution

Answer: Option D

No explanation is given for this question. Let's Discuss on Board

Capacitive reactance is more when

A) Capacitance is less and frequency of supply is less B) Capacitance is less and frequency of supply is more C) Capacitance is more and frequency of supply is less D) Capacitance is more and frequency of supply is more

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

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