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Electrical Engineering - Fundamentals Circuits And Circuit Theory MCQs
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Electrical Engineering - Fundamentals Circuits And Circuit Theory MCQs
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25 Questions

1. Time constant of an inductive circuit
2. In a parallel R-C circuit, the current always______the applied voltage
3. Power factor of an electrical circuit is equal to
4. The power factor of a D.C. circuit is always
5. In series resonant circuit, increasing inductance to its twice value and reducing capacitance to its half value
6. If resistance is 20 Q. and inductance is 27 in a R-L series circuit, then time constant of this circuit will be
7. The period of a sine wave is _____ seconds.Its frequency is
8. An A.C. voltage is impressed across a pure resistance of 3.5 ohms in parallel with a pure inductance of impedance of 3.5 ohms,
9. The r.m.s. value of alternating current is given by steady (D.C.) current which when flowing through a given circuit for a given time produces
10. The period of a wave is
11. In a pure inductive circuit
12. The product of apparent power and cosine of the phase angle between circuit voltage and current is
13. Power factor of electric bulb is
14. For a sine wave with peak value Emax______8.30. the average value is
15. The phosphors for which of the following pair are 180° out of phase for VL, VC and VR?
16. Which of the following refers to a parallel circuit ?
17. Power factor of the following circuit will be unity
18. The form factor is the ratio of
19. Pure inductive circuit takes power from the A.C. line when
20. Inductance affects the direct current flow
21. Aphasoris
22. For a frequency of 200 Hz, the time period will be
23. The frequency of an alternating current is
24. Capacitive reactance is more when
25. Wire-wound resistors are unsuitable for use at high frequencies because they

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