EEE Exam Q2 (Questions & Answers) PDF

**1. The unit of frequency is:** **A) Volt** **B) Ampere** **C) Hertz** **D) Ohm** **Answer: C) Hertz** **2. The time period of a waveform is the reciprocal of:** **A) Voltage** **B) Current** **C) Frequency** **D) Amplitude** **Answer: C) Frequency** **3. In an AC circuit, power factor...

**1. The unit of frequency is:** **A) Volt** **B) Ampere** **C) Hertz** **D) Ohm** **Answer: C) Hertz** **2. The time period of a waveform is the reciprocal of:** **A) Voltage** **B) Current** **C) Frequency** **D) Amplitude** **Answer: C) Frequency** **3. In an AC circuit, power factor is defined as:** **A) Sine of the phase angle** **B) Cosine of the phase angle** **C) Tangent of the phase angle** **D) None of these** **Answer: B) Cosine of the phase angle** **4. In a purely resistive circuit, the power factor is:** **A) Zero** **B) Unity** **C) Leading** **D) Lagging** **Answer: B) Unity** **5. The opposition offered by a capacitor to AC is called:** **A) Inductive reactance** **B) Capacitive reactance** **C) Resistance** **D) Impedance** **Answer: B) Capacitive reactance** **6. The unit of reactance is:** **A) Ohm** **B) Volt** **C) Ampere** **D) Henry** **Answer: A) Ohm** **7. In an AC circuit, impedance is a combination of:** **A) Resistance and reactance** **B) Voltage and current** **C) Capacitance and inductance** **D) None of the above** **Answer: A) Resistance and reactance** **8. The formula for capacitive reactance () is:** **A)** **B)** **C)** **D)** **Answer: B)** **9. For an ideal inductor, the power factor is:** **A) Unity** **B) Zero** **C) Leading** **D) Lagging** **Answer: B) Zero** **10. The unit of apparent power is:** **A) Watt** **B) Volt-Ampere (VA)** **C) Ohm** **D) Farad** **Answer: B) Volt-Ampere (VA)** **11. RMS value of current is equal to:** **A) Peak value** **B) × Peak value** **C) Peak value /** **D) Peak value / 2** **Answer: C) Peak value /** **12. In an AC circuit, the average value of a sinusoidal waveform over a complete cycle is:** **A) Peak value** **B) Zero** **C) RMS value** **D) None of these** **Answer: B) Zero** **13. The angular frequency () is related to frequency () by:** **A)** **B)** **C)** **D) None of these** **Answer: A)** **14. Which device measures power in an AC circuit?** **A) Voltmeter** **B) Ammeter** **C) Wattmeter** **D) Ohmmeter** **Answer: C) Wattmeter** **15. The power consumed in a purely inductive circuit is:** **A) Maximum** **B) Minimum** **C) Zero** **D) Cannot be determined** **Answer: C) Zero** **16. The unit of real power is:** **A) Volt** **B) Watt** **C) Henry** **D) Ampere** **Answer: B) Watt** **17. Which waveform is the most commonly used in AC systems?** **A) Triangular** **B) Square** **C) Sinusoidal** **D) Sawtooth** **Answer: C) Sinusoidal** **18. Apparent power () is calculated using:** **A)** **B)** **C)** **D) None of the above** **Answer: A)** **19. In a series RLC circuit, resonance occurs when:** **A)** **B)** **C)** **D) None of these** **Answer: C)** **20. In a purely capacitive circuit, the current:** **A) Lags the voltage by 90°** **B) Leads the voltage by 90°** **C) Is in phase with voltage** **D) None of the above** **Answer: B) Leads the voltage by 90°** **21. The instantaneous value of a sinusoidal voltage is given by:** **A)** **B)** **C)** **D) None of the above** **Answer: A)** **22. Inductive reactance () is given by:** **A)** **B)** **C)** **D) None of these** **Answer: B)** **23. The quality factor of a series RLC circuit is defined as:** **A)** **B)** **C)** **D) None of these** **Answer: B)** **24. Impedance in a series RLC circuit is given by:** **A)** **B)** **C)** **D)** **Answer: A)** **25. A purely resistive circuit has a power factor of:** **A) Zero** **B) 1** **C)** **D)** **Answer: B) 1** **26. What is the phase difference between voltage and current in a purely inductive circuit?** **A) 0°** **B) 45°** **C) 90°** **D) 180°** **Answer: C) 90°** **27. RMS value of AC voltage is:** **A) Average value ×** **B) Peak value /** **C) Peak value ×** **D) None of these** **Answer: B) Peak value /** **28. The term \"lagging power factor\" refers to:** **A) Resistive loads** **B) Capacitive loads** **C) Inductive loads** **D) None of these** **Answer: C) Inductive loads** **29. In a parallel RLC circuit, at resonance:** **A) Impedance is maximum** **B) Impedance is minimum** **C) Resistance equals reactance** **D) None of the above** **Answer: B) Impedance is minimum** **30. Which of the following represents real power?** **A)** **B)** **C)** **D) None of these** **Answer: C)** **\-\--** **31. A circuit having only resistance will have a power factor of:** **A) 0** **B) 1** **C) 0.5** **D)** **Answer: B) 1** **32. Which device converts AC to DC?** **A) Transformer** **B) Rectifier** **C) Oscillator** **D) Amplifier** **Answer: B) Rectifier** **33. At resonance in an RLC circuit:** **A)** **B) Current is maximum** **C) Impedance is purely resistive** **D) All of the above** **Answer: D) All of the above** **34. In a purely capacitive circuit, the power factor is:** **A) Leading** **B) Lagging** **C) Zero** **D) Unity** **Answer: A) Leading** **35. Which of the following is a vector quantity?** **A) Power factor** **B) Voltage** **C) Impedance** **D) None of these** **Answer: C) Impedance** **\-\--** **Remaining Questions (36-50)** **36. The unit of inductance is:** **Answer: Henry** **37. The power factor of an ideal transformer is:** **Answer: Unity** **38. In an AC circuit, the total opposition is called:** **Answer: Impedance** **39. At resonance, reactive power is:** **Answer: Zero** **40. The bandwidth of an RLC circuit is inversely proportional to:** **Answer: -factor** **41. Voltage leads current by 90° in:** **Answer: Purely inductive circuit** **42. Real power is also called:** **Answer: Active power** **43. Average power in a purely reactive circuit is:** **Answer: Zero** **44. Resonance occurs when:** **Answer:** **45. The peak factor of a sine wave is:** **Answer:** **46. Which waveform is periodic?** **Answer: Sinusoidal** **47. In an AC generator, the generated emf is:** **Answer: Alternating** **48. The effect of skin effect increases with:** **Answer: Frequency** **49. A circuit with R, L, and C is called:** **Answer: RLC circuit** **50. Inductive reactance depends on:** **Answer: Frequency**