MCQOPTIONS
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MCQOPTIONS
This section includes 14 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. |
Which statement is true about emitter modulator amplifier for amplitude modulation? |
| A. | operates in class A mode |
| B. | operates in class C mode |
| C. | operates in class B mode |
| D. | operates in class D mode |
| Answer» B. operates in class C mode | |
| 2. |
In communication system, redundancy ________ |
| A. | Helps to detect error |
| B. | Helps to correct error |
| C. | Reduces efficiency of communication |
| D. | Helps to detect and correct error and also reduces efficiency |
| Answer» E. | |
| 3. |
Communication consists of electrical means of sending information only. |
| A. | True |
| B. | False |
| Answer» C. | |
| 4. |
What is the auto-correlation function of a signal (t) at t0=0? |
| A. | It is equal to average voltage of the signal |
| B. | It is equal to average power of the signal |
| C. | It is equal to zero |
| D. | It is equal to infinite |
| Answer» C. It is equal to zero | |
| 5. |
WHICH_STATEMENT_IS_TRUE_ABOUT_EMITTER_MODULATOR_AMPLIFIER_FOR_AMPLITUDE_MODULATION??$ |
| A. | operates in class A mode |
| B. | operates in class C mode |
| C. | operates in class B mode |
| D. | operates in class D mode |
| Answer» B. operates in class C mode | |
| 6. |
IN_COMMUNICATION_SYSTEM,_REDUNDANCY_________?$ |
| A. | Helps to detect error |
| B. | Helps to correct error |
| C. | Reduces efficiency of communication |
| D. | Helps to detect and correct error and also reduces efficiency |
| Answer» E. | |
| 7. |
Communication consists of electrical means of sending information only? |
| A. | True |
| B. | False |
| Answer» C. | |
| 8. |
What is the maximum transmission efficiency? |
| A. | 67.88% |
| B. | 33.33% |
| C. | 73% |
| D. | 54.03% |
| Answer» C. 73% | |
| 9. |
Which statement is correct about ergodic process? |
| A. | ensemble and time averages are different |
| B. | ensemble and time averages are opposite to each other |
| C. | ensemble and time averages are identical |
| D. | ensemble average are exactly twice of time averages |
| Answer» D. ensemble average are exactly twice of time averages | |
| 10. |
A ransom signal is defined as ergodic, if ________ |
| A. | all type of ensemble averages are interchangeable |
| B. | all type of ensemble averages are not interchangeable |
| C. | all type of ensemble averages are constant |
| D. | all type of ensemble averages are double than their previous value |
| Answer» B. all type of ensemble averages are not interchangeable | |
| 11. |
A signal is called ergodic if all type of ensemble averages are constant. |
| A. | True |
| B. | False |
| Answer» C. | |
| 12. |
In TV transmission, sound signal is ________ modulated. |
| A. | Phase |
| B. | Pulse |
| C. | Frequency |
| D. | Amplitude |
| Answer» D. Amplitude | |
| 13. |
The auto-correlation function is _________ |
| A. | impulse function |
| B. | linear function |
| C. | odd function |
| D. | even function |
| Answer» E. | |
| 14. |
What is the auto-correlation function of a signal (t) at t0=0? |
| A. | It is equal to average voltage of the signal |
| B. | It is equal to average power of the signal |
| C. | It is equal to zero |
| D. | It is equal to infinite |
| Answer» C. It is equal to zero | |