MCQOPTIONS
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MCQOPTIONS
This section includes 38 Mcqs, each offering curated multiple-choice questions to sharpen your Electrical Engineering Questions knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
When either L or C is increased, the resonant frequency of LC circuit ____________? |
| A. | Remains the same |
| B. | Increases |
| C. | Decreases |
| D. | Insufficient data |
| Answer» D. Insufficient data | |
| 2. |
Tuned class C amplifiers are used for RF signals of________________? |
| A. | Low power |
| B. | High power |
| C. | Very high power |
| D. | None of the above |
| Answer» E. | |
| 3. |
The voltage gain of a tuned amplifier is____________at resonant frequency |
| A. | Minimum |
| B. | Maximum |
| C. | Half-way between maximum and minimum |
| D. | Zero |
| Answer» C. Half-way between maximum and minimum | |
| 4. |
The Q of an LC circuit is given by _________________? |
| A. | 2pfr x R |
| B. | R / 2pfrL |
| C. | 2pfrL / R |
| D. | R2/2pfrL |
| Answer» D. R2/2pfrL | |
| 5. |
The Q of a tuned circuit refers to the property of_______________? |
| A. | Sensitivity |
| B. | Fidelity |
| C. | Selectivity |
| D. | None of the above |
| Answer» D. None of the above | |
| 6. |
The Q of a tuned amplifier is generally _________________? |
| A. | Less than 5 |
| B. | Less than 10 |
| C. | More than 10 |
| D. | None of the above |
| Answer» D. None of the above | |
| 7. |
The Q of a tuned amplifier is 50. If the resonant frequency for the amplifier is 1000kHZ, then bandwidth is __________________? |
| A. | 10kHz |
| B. | 40 kHz |
| C. | 30 kHz |
| D. | 20 kHz |
| Answer» E. | |
| 8. |
The dimensions of L/CR are that of _______________? |
| A. | Farad |
| B. | Henry |
| C. | Ohm |
| D. | None of the above |
| Answer» D. None of the above | |
| 9. |
In the double tuned circuit, if the mutual inductance between the two tuned circuits is decreased, the level of resonance curve ___________________? |
| A. | Remains the same |
| B. | Is lowered |
| C. | Is raised |
| D. | None of the above |
| Answer» D. None of the above | |
| 10. |
In series resonance, there is__________________? |
| A. | Voltage amplification |
| B. | Current amplification |
| C. | Both voltage and current amplification |
| D. | None of the above |
| Answer» B. Current amplification | |
| 11. |
In parallel resonance, there is _______________? |
| A. | Both voltage and current amplification |
| B. | Voltage amplifications |
| C. | Current amplification |
| D. | None of the above |
| Answer» D. None of the above | |
| 12. |
In parallel resonance, the circuit impedance is_________________? |
| A. | C/LR |
| B. | R/LC |
| C. | CR/L |
| D. | L/CR |
| Answer» E. | |
| 13. |
In a parallel LC circuit, if the signal frequency is decreased below the resonant frequency, then________________? |
| A. | XL decreases and XC increases |
| B. | XL increases and XC decreases |
| C. | Line current becomes minimum |
| D. | None of the above |
| Answer» B. XL increases and XC decreases | |
| 14. |
In a parallel LC circuit, if the input signal frequency is increased above resonant frequency then _______________? |
| A. | XL increases and XC decreases |
| B. | XL decreases and XC increases |
| C. | Both XL and XC increase |
| D. | Both XL and XC decrease |
| Answer» B. XL decreases and XC increases | |
| 15. |
If the resistance of a tuned circuit is increased, the Q of the circuit _______________? |
| A. | Is increased |
| B. | Is decreased |
| C. | Remains the same |
| D. | None of the above |
| Answer» C. Remains the same | |
| 16. |
If Q of an LC circuit increases, then bandwidth ______________? |
| A. | Increases |
| B. | Decreases |
| C. | Remains the same |
| D. | Insufficient data |
| Answer» C. Remains the same | |
| 17. |
If L/C ratio of a parallel LC circuit is increased, the Q of the circuit______________? |
| A. | Is decreased |
| B. | Is increased |
| C. | Remains the same |
| D. | None of the above |
| Answer» C. Remains the same | |
| 18. |
If a high degree of selectivity is desired, then double-tuned circuit should have ___________ coupling? |
| A. | Loose |
| B. | Tight |
| C. | Critical |
| D. | None of the above |
| Answer» B. Tight | |
| 19. |
Frequencies above ______________ kHz are called radio frequencies? |
| A. | 2 |
| B. | 10 |
| C. | 50 |
| D. | 200 |
| Answer» E. | |
| 20. |
For frequencies below the resonant frequency , a parallel LC circuit behaves as a ______________load? |
| A. | Inductive |
| B. | Resistive |
| C. | Capacitive |
| D. | None of the above |
| Answer» B. Resistive | |
| 21. |
For frequencies below resonant frequency, a series LC circuit behaves as a _____________ load? |
| A. | Resistive |
| B. | Capacitive |
| C. | Inductive |
| D. | None of the above |
| Answer» C. Inductive | |
| 22. |
For frequencies above the resonant frequency , a series LC circuit behaves as a ____________load? |
| A. | Resistive |
| B. | Inductive |
| C. | Capacitive |
| D. | None of the above |
| Answer» C. Capacitive | |
| 23. |
For frequencies above the resonant frequency, a parallel LC circuit behaves as a ____________ load? |
| A. | Capacitive |
| B. | Resistive |
| C. | Inductive |
| D. | None of the above |
| Answer» B. Resistive | |
| 24. |
Double tuned circuits are used in ____________ stages of a radio receiver? |
| A. | IF |
| B. | Audio |
| C. | Output |
| D. | None of the above |
| Answer» B. Audio | |
| 25. |
At series resonance, voltage across L is____________voltage across C? |
| A. | Equal to but opposite in phase to |
| B. | Equal to but in phase with |
| C. | Greater than but in phase with |
| D. | Less than but in phase with |
| Answer» B. Equal to but in phase with | |
| 26. |
At series resonance, the phase angle between applied voltage and circuit is______________? |
| A. | 90o |
| B. | 180o |
| C. | 0o |
| D. | None of the above |
| Answer» D. None of the above | |
| 27. |
At series resonance, the net reactive component of circuit current is _______________? |
| A. | Zero |
| B. | Inductive |
| C. | Capacitive |
| D. | None of the above |
| Answer» B. Inductive | |
| 28. |
At series resonance, the circuit offers____________ impedance? |
| A. | Zero |
| B. | Maximum |
| C. | Minimum |
| D. | None of the above |
| Answer» D. None of the above | |
| 29. |
At series or parallel resonance, the circuit power factor is ________________? |
| A. | 0 |
| B. | 5 |
| C. | 1 |
| D. | 8 |
| Answer» D. 8 | |
| 30. |
At series or parallel resonance, the circuit behaves as a ______________ load? |
| A. | Capacitive |
| B. | Resistive |
| C. | Inductive |
| D. | None of the above |
| Answer» C. Inductive | |
| 31. |
At parallel resonance, the ratio L/C is ______________? |
| A. | Very large |
| B. | Zero |
| C. | Small |
| D. | None of the above |
| Answer» B. Zero | |
| 32. |
At parallel resonance, the phase angle between the applied voltage and circuit current is _____________? |
| A. | 90o |
| B. | 180o |
| C. | 0o |
| D. | None of the above |
| Answer» D. None of the above | |
| 33. |
At parallel resonance, the net reactive component circuit current is _______________? |
| A. | Capacitive |
| B. | Zero |
| C. | Inductive |
| D. | None of the above |
| Answer» C. Inductive | |
| 34. |
At parallel resonance, the line current is_______________? |
| A. | Minimum |
| B. | Maximum |
| C. | Quite large |
| D. | None of the above |
| Answer» B. Maximum | |
| 35. |
A tuned amplifier is used in ___________ applications? |
| A. | Radio frequency |
| B. | Low frequency |
| C. | Audio frequency |
| D. | None of the above |
| Answer» B. Low frequency | |
| 36. |
A tuned amplifier uses__________load? |
| A. | Resistive |
| B. | Capacitive |
| C. | LC tank |
| D. | Inductive |
| Answer» D. Inductive | |
| 37. |
A tuned amplifier is generally operated in ____________operation? |
| A. | Class A |
| B. | Class C |
| C. | Class B |
| D. | None of the above |
| Answer» C. Class B | |
| 38. |
A resonant circuit contains ____________elements? |
| A. | R and L only |
| B. | R and C only |
| C. | Only R |
| D. | L and C |
| Answer» E. | |