MCQOPTIONS
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MCQOPTIONS
This section includes 13 Mcqs, each offering curated multiple-choice questions to sharpen your Analog Communications knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
A heterodyne frequency changer is ________ |
| A. | Mixer |
| B. | Demodulator |
| C. | Modulator |
| D. | Local Oscillator |
| Answer» B. Demodulator | |
| 2. |
Superheterodyne principle provides selectivity at ________ |
| A. | RF stage |
| B. | IF stage |
| C. | Demodulating Stage |
| D. | Audio Stage |
| Answer» C. Demodulating Stage | |
| 3. |
Figure of merit is ________ |
| A. | Ratio of output signal to noise ratio to input signal to noise ratio |
| B. | Ratio of input signal to noise ratio to output signal to noise ratio |
| C. | Ratio of output signal to input signal to a system |
| D. | Ratio of input signal to output signal to a system |
| Answer» B. Ratio of input signal to noise ratio to output signal to noise ratio | |
| 4. |
What is the use of a varactor diode in radio receiver? |
| A. | Demodulation |
| B. | Mixing |
| C. | Multiplexing |
| D. | Tuning |
| Answer» E. | |
| 5. |
SUPERHETERODYNE_PRINCIPLE_PROVIDES_SELECTIVITY_AT_________?$ |
| A. | RF stage |
| B. | IF stage |
| C. | Demodulating Stage |
| D. | Audio Stage |
| Answer» C. Demodulating Stage | |
| 6. |
A heterodyne frequency changer is ________$ |
| A. | Mixer |
| B. | Demodulator |
| C. | Modulator |
| D. | Local Oscillator |
| Answer» B. Demodulator | |
| 7. |
What is the function of radio receiver? |
| A. | to detect and amplify information signal from the carrier |
| B. | to modulate a message signal |
| C. | to produce radio waves |
| D. | to convert one form of energy into other |
| Answer» B. to modulate a message signal | |
| 8. |
What is the use of varacter diode in radio receiver? |
| A. | Demodulation |
| B. | Mixing |
| C. | Multiplexing |
| D. | Tuning |
| Answer» E. | |
| 9. |
Process of recovering information signal from received carrier is known as ________ |
| A. | Sensitivity |
| B. | Selectivity |
| C. | Demodulation |
| D. | Fidelity |
| Answer» D. Fidelity | |
| 10. |
Which oscillator is used as a local oscillator in radio receiver? |
| A. | Wien-bridge |
| B. | Hartley |
| C. | Crystal |
| D. | Phase Shift |
| Answer» C. Crystal | |
| 11. |
In a receiver, noise is usually developed at ________ |
| A. | Audio stage |
| B. | Receiving antenna |
| C. | RF stage |
| D. | IF stage |
| Answer» D. IF stage | |
| 12. |
What is Fidelity? |
| A. | Equally amplifies all the signal frequencies at receiver |
| B. | Ability of receiver to select wanted signal from various incoming signal |
| C. | Minimum magnitude of input signal required to produced a specified output |
| D. | Ability to amplify weak signals |
| Answer» B. Ability of receiver to select wanted signal from various incoming signal | |
| 13. |
Demodulation is done in ________ |
| A. | Channel |
| B. | Receiver |
| C. | Receiving antenna |
| D. | Transducer |
| Answer» C. Receiving antenna | |