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-5 section-1

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

A pure inductance connected across 250 V, 50 Hz supply consumes 100 W. This consumption can be attributed to

A) The big size of the inductor B) The reactance of the inductor C) The current flowing in the inductor D) The statement given is false

Discuss

Answer & Solution

Answer: Option D

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

In a series resonant circuit, the impedance of the circuit is

A) Minimum B) Maximum C) Zero D) None of the above

Discuss

Answer & Solution

Answer: Option A

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

In series resonant circuit, increasing inductance to its twice value and reducing capacitance to its half value

A) Will change the maximum value of current at resonance B) Will change the resonance frequency C) Will change the impedance at resonance frequency D) Will increase the selectivity of the circuit

Discuss

Answer & Solution

Answer: Option D

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

Power factor of the following circuit will be zero

A) Resistance B) Inductance C) Capacitance D) Both B and C

Discuss

Answer & Solution

Answer: Option D

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

Form Factor is the ratio of

A) $$\frac{{{\text{Average value}}}}{{{\text{Root Mean Square value}}}}$$ B) $$\frac{{{\text{Average value}}}}{{{\text{Peak value}}}}$$ C) $$\frac{{{\text{Root Mean Square value}}}}{{{\text{Average value}}}}$$ D) $$\frac{{{\text{Root Mean Square value}}}}{{{\text{Peak value}}}}$$

Discuss

Answer & Solution

Answer: Option C

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

The form factor is the ratio of

A) Peak value to r.m.s. value B) r.m.s. value to average value C) Average value to r.m.s. value D) None of the above

Discuss

Answer & Solution

Answer: Option B

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

In each of the three coils of a three phase generator, an alternating voltage having an r.m.s. value of 220 V is induced. Which of the following values is indicated by the voltmeters?

A) 220 V B) $$200\sqrt 3 {\text{ V}}$$ C) $$\frac{{200}}{{\sqrt 3 }}{\text{ V}}$$ D) None of the above

Discuss

Answer & Solution

Answer: Option A

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

The period of a sine wave is ___________ seconds. Its frequency is

A) 20 Hz B) 30 Hz C) 40 Hz D) 50 Hz

Discuss

Answer & Solution

Answer: Option D

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

The time constant of the capacitance circuit is defined as the time during which voltage

A) Falls to 36.8% of its final steady value B) Rises to 38.6% of its final steady value C) Rises to 63.2% of its final steady value D) None of the above

Discuss

Answer & Solution

Answer: Option C

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

The square waveform of current has following relation between r.m.s. value and average value.

A) r.m.s. value is equal to average value B) r.m.s. value of current is greater than average value C) r.m.s. value of current is less than average value D) None of the above

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