AC Fundamentals MCQ | Circuit Theory MCQ | Electrical MCQ
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AC Fundamentals, Circuits, And Circuit Theory MCQ questions & answers are available for Electrical Engineering students to clear Gate exams.
- average value
- mean value
- RMS value
- peak value
Question 1: The voltage of domestic supply is 220 V. This value represents?
Answers: RMS value
- depends upon the magnitude of R, L and C
- depends upon the magnitude of R
- depends upon the magnitude of L
- depends upon the magnitude of C
Question 2: Magnitude of current at resonance in R-L-C circuit?
Answers: depends upon the magnitude of R, L and C
- none of the above
- zero
- maximum
- minimum
Question 3: ln a series resonant circuit, the impedance of the circuit is?
Answers: minimum
- Heat produced is zero
- Power factor is unity
- Power consumed is zero
- Work done is zero
Question 4: For a purely resistive circuit the following statement is in correct?
Answers: Power factor is unity
- none of the above
- impedance
- selectivity
- conductance
Question 5: The ability of a resonant circuit to discriminate between one particular frequency and all others is called its?
Answers: selectivity
- reactive power is more than actual power
- actual power is more than reactive power
- reactive power is more than apparent power
- apparent power is more than actual power
Question 6: In any AC circuit always?
Answers: apparent power is more than actual power
- phase angle
- current
- voltage
- power
Question 7: While drawing vector diagram for a series circuit, the reference vector is?
Answers: current
- decreasing the number of turns
- increasing core length
- choosing core material having high relative permeability
- decreasing the diameter of the former
Question 8: The inductance of a coil can be increased by?
Answers: choosing core material having high relative permeability
- true power
- none of the above
- apparent power
- reactive power
Question 9: When an alternating current passes through an ohmic resistance the electrical power converted into heat is?
Answers: true power
- none of the above
- resistive
- inductive
- capacitive
Question 10: At very low frequencies a series R-C circuit behaves as almost purely ......?
Answers: capacitive
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Correct: 0 Wrong: 0
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