MCQOPTIONS
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MCQOPTIONS
This section includes 63 Mcqs, each offering curated multiple-choice questions to sharpen your Electrical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
In a series RLC circuit, the phase difference between the current in the capacitor and the current in the resistor is? |
| A. | 0° |
| B. | 90° |
| C. | 180° |
| D. | 360° |
| Answer» B. 90° | |
| 2. |
The current in the capacitor leads the voltage in a series RLC circuit ___________ resonant frequency. |
| A. | Above |
| B. | Below |
| C. | Equal to |
| D. | Depends on the circuit |
| Answer» C. Equal to | |
| 3. |
The energy stored in the inductor is of _________ nature. |
| A. | Electrostatic |
| B. | Magnetic |
| C. | Neither electrostatic nor magnetic |
| D. | Either electrostatic or magnetic |
| Answer» C. Neither electrostatic nor magnetic | |
| 4. |
What happens to the voltage across the inductor when the Q factor decreases? |
| A. | Increases |
| B. | Decreases |
| C. | Remains the same |
| D. | Becomes zero |
| Answer» C. Remains the same | |
| 5. |
The energy stored in the capacitor is of _________ nature. |
| A. | Electrostatic |
| B. | Magnetic |
| C. | Neither electrostatic nor magnetic |
| D. | Either electrostatic or magnetic |
| Answer» B. Magnetic | |
| 6. |
Find the Q factor when the voltage across the inductor is 2000V and the source voltage is 100V. |
| A. | 10 |
| B. | 20 |
| C. | 30 |
| D. | 40 |
| Answer» C. 30 | |
| 7. |
In a series RLC circuit, the phase difference between the current in the inductor and the current in the resistor is? |
| A. | 0° |
| B. | 90° |
| C. | 180° |
| D. | 360° |
| Answer» B. 90° | |
| 8. |
In a series RLC circuit, the phase difference between the current in the capacitor and the current in the inductor is? |
| A. | 0° |
| B. | 90° |
| C. | 180° |
| D. | 360° |
| Answer» B. 90° | |
| 9. |
What happens to the voltage across the capacitor when the Q factor increases? |
| A. | Increases |
| B. | Decreases |
| C. | Remains the same |
| D. | Becomes zero |
| Answer» B. Decreases | |
| 10. |
At resonance, the capacitive energy is ___________ inductive energy. |
| A. | Greater than |
| B. | Less than |
| C. | Equal to |
| D. | Depends on the circuit |
| Answer» D. Depends on the circuit | |
| 11. |
The maximum electrostatic energy stored in a capacitor at any instance is? |
| A. | CVₘ² |
| B. | 1/2*CVₘ² |
| C. | CVₘ |
| D. | CVₘ/2 |
| Answer» C. CVₘ | |
| 12. |
Q is the ratio of? |
| A. | Active power to reactive power |
| B. | Reactive power to active power |
| C. | Reactive power to average power |
| D. | Reactive power to capacitive power |
| Answer» D. Reactive power to capacitive power | |
| 13. |
Find the reactive power when the average power is 5W and Q=2. |
| A. | 10W |
| B. | 5W |
| C. | 2W |
| D. | 1W |
| Answer» B. 5W | |
| 14. |
Find the value of current in the bandwidth range when the maximum value of current is 50A. |
| A. | 56.65A |
| B. | 35.36A |
| C. | 45.34A |
| D. | 78.76A |
| Answer» C. 45.34A | |
| 15. |
At resonance, bandwidth includes the frequency range that allows _____ percent of the maximum voltage to flow. |
| A. | 33.33 |
| B. | 66.67 |
| C. | 50 |
| D. | 70.7 |
| Answer» E. | |
| 16. |
The maximum magnetic energy stored in an inductor at any instance is? |
| A. | E=LIₘ²/2 |
| B. | E=LIₘ/2 |
| C. | E=LIₘ² |
| D. | E=LIₘ²*2 |
| Answer» B. E=LIₘ/2 | |
| 17. |
Find the value of Q if the reactive power is 10W and the average power is 5W. |
| A. | 10 |
| B. | 5 |
| C. | 2 |
| D. | 1 |
| Answer» D. 1 | |
| 18. |
In a series RLC circuit, the phase difference between the voltage across the capacitor and the current in the circuit is? |
| A. | 0° |
| B. | 90° |
| C. | 180° |
| D. | 360° |
| Answer» C. 180° | |
| 19. |
In a series RLC circuit, the phase difference between the voltage across the inductor and the current in the circuit is? |
| A. | 0° |
| B. | 90° |
| C. | 180° |
| D. | 360° |
| Answer» C. 180° | |
| 20. |
The current in the inductor lags the voltage in a series RLC circuit ___________ resonant frequency. |
| A. | Above |
| B. | Below |
| C. | Equal to |
| D. | Depends on the circuit |
| Answer» B. Below | |
| 21. |
At resonance, the circuit appears __________ |
| A. | Inductive |
| B. | Capacitive |
| C. | Either inductive or capacitive |
| D. | Resistive |
| Answer» E. | |
| 22. |
The current in the capacitor ___________ the voltage in a series RLC circuit below the resonant frequency. |
| A. | Leads |
| B. | Lags |
| C. | Equal to |
| D. | Depends on the circuit |
| Answer» B. Lags | |
| 23. |
The current in the inductor ___________ the voltage in a series RLC circuit above the resonant frequency. |
| A. | Leads |
| B. | Lags |
| C. | Equal to |
| D. | Depends on the circuit |
| Answer» C. Equal to | |
| 24. |
In selective circuits, higher the Q factor _________ the peak. |
| A. | Sharper |
| B. | Blunter |
| C. | Neither sharper nor blunter |
| D. | Either sharper or blunter |
| Answer» B. Blunter | |
| 25. |
What is the Q factor of a selective circuit? |
| A. | Very low |
| B. | Very high |
| C. | Zero |
| D. | Infinity |
| Answer» C. Zero | |
| 26. |
Q is a measure of _________ |
| A. | Resonance |
| B. | Bandwidth |
| C. | Selectivity |
| D. | Either resonance or bandwidth |
| Answer» D. Either resonance or bandwidth | |
| 27. |
In a series RLC circuit, the phase difference between the current in the circuit and the voltage across the capacitor is? |
| A. | 0° |
| B. | 90° |
| C. | 180° |
| D. | 360° |
| Answer» C. 180° | |
| 28. |
_________ the resonant frequency, the current in the inductor lags the voltage in a series RLC circuit. |
| A. | Above |
| B. | Below |
| C. | Equal to |
| D. | Depends on the circuit |
| Answer» B. Below | |
| 29. |
For a sharp resonance, bandwidth is ______________ |
| A. | low |
| B. | high |
| C. | zero |
| D. | infinity |
| Answer» B. high | |
| 30. |
Bandwidth is the difference of_____________________ frequencies. |
| A. | half power |
| B. | full power |
| C. | double power |
| D. | wattless |
| Answer» B. full power | |
| 31. |
Shape of the resonance curve depends upon the? |
| A. | Q-factor |
| B. | Voltage |
| C. | Current |
| D. | Either voltage or current |
| Answer» B. Voltage | |
| 32. |
In a series RLC circuit, the phase difference between the voltage across the capacitor and the voltage across the resistor is? |
| A. | 0° |
| B. | 90° |
| C. | 180° |
| D. | 360° |
| Answer» C. 180° | |
| 33. |
In order for high selectivity, the resistance must be? |
| A. | Small |
| B. | Large |
| C. | Negative |
| D. | Positive |
| Answer» B. Large | |
| 34. |
In a series RLC circuit, the phase difference between the voltage across the inductor and the voltage across the resistor is? |
| A. | 0° |
| B. | 90° |
| C. | 180° |
| D. | 360° |
| Answer» C. 180° | |
| 35. |
In a series RLC circuit, the phase difference between the voltage across the resistor and the current in the circuit is? |
| A. | 0° |
| B. | 90° |
| C. | 180° |
| D. | 360° |
| Answer» B. 90° | |
| 36. |
Find the Q factor when the voltage across the capacitor is 1000V and the source voltage is 100V. |
| A. | 10 |
| B. | 20 |
| C. | 30 |
| D. | 40 |
| Answer» B. 20 | |
| 37. |
What is the voltage across the inductor when the source voltage is 200V and the Q factor is 10? |
| A. | 100V |
| B. | 20V |
| C. | 2000V |
| D. | 0V |
| Answer» D. 0V | |
| 38. |
At resonance condition, the voltage across the capacitor and inductor is _________ the source voltage. |
| A. | Greater than |
| B. | Less than |
| C. | Equal to |
| D. | Much less than |
| Answer» B. Less than | |
| 39. |
Find the value of voltage in the bandwidth range when the maximum value of voltage is 100 V. |
| A. | 56.65 V |
| B. | 35.36 V |
| C. | 45.34 V |
| D. | 70.72 V |
| Answer» E. | |
| 40. |
At resonance, electrostatic energy is ___________ the magnetic energy. |
| A. | Greater than |
| B. | Less than |
| C. | Equal to |
| D. | Depends on the circuit |
| Answer» D. Depends on the circuit | |
| 41. |
Find the source voltage when the voltage across the capacitor is 1000V and the Q factor is 10. |
| A. | 10V |
| B. | 200V |
| C. | 100V |
| D. | 90V |
| Answer» D. 90V | |
| 42. |
In a series RLC circuit, the phase difference between the voltage across the capacitor and the voltage across the inductor is? |
| A. | 0° |
| B. | 90° |
| C. | 180° |
| D. | 360° |
| Answer» D. 360° | |
| 43. |
Current is maximum at __________ frequency of bandwidth. |
| A. | left end |
| B. | middle |
| C. | right end |
| D. | all end |
| Answer» C. right end | |
| 44. |
Find the source voltage when the voltage across the inductor is 2000V and the Q factor is 20. |
| A. | 10V |
| B. | 200V |
| C. | 100V |
| D. | 90V |
| Answer» D. 90V | |
| 45. |
A circuit is said to be selective if it has a _____ peak and ____ bandwidth. |
| A. | Blunt, narrow |
| B. | Sharp, narrow |
| C. | Sharp, broad |
| D. | Blunt, broad |
| Answer» C. Sharp, broad | |
| 46. |
_________ the resonant frequency, the current in the capacitor leads the voltage in a series RLC circuit. |
| A. | Above |
| B. | Below |
| C. | Equal to |
| D. | Depends on the circuit |
| Answer» C. Equal to | |
| 47. |
In a series RLC circuit, the phase difference between the current in the circuit and the voltage across the resistor is? |
| A. | 0° |
| B. | 90° |
| C. | 180° |
| D. | 360° |
| Answer» B. 90° | |
| 48. |
At bandwidth frequency range, the value of the voltage V is? |
| A. | V=Vm/2 |
| B. | V=Vm² |
| C. | V=Vm |
| D. | V=Vm/√2 |
| Answer» E. | |
| 49. |
The SI unit for bandwidth is? |
| A. | Hz |
| B. | Watt |
| C. | kHz |
| D. | kW |
| Answer» B. Watt | |
| 50. |
At bandwidth frequency range, the value of the current I is? |
| A. | I=Im/2 |
| B. | I=Im² |
| C. | I=Im |
| D. | I=Im/√2 |
| Answer» E. | |