MCQOPTIONS
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MCQOPTIONS
This section includes 15 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. |
Marconi antenna ________ |
| A. | is a grounded antenna |
| B. | is an ungrounded antenna |
| C. | can either be grounded or ungrounded antenna |
| D. | can neither be grounded nor ungrounded antenna |
| Answer» B. is an ungrounded antenna | |
| 2. |
In a Vidicon camera tube, the side of target plate facing the light has a coating of Sno2 (tin oxide) and the side facing electron gun has a coating of antimony trisulphide. |
| A. | True |
| B. | False |
| C. | |
| Answer» B. False | |
| 3. |
Autocorrelation function of white noise is ________ |
| A. | an impulse function |
| B. | a step function |
| C. | a constant |
| D. | a variable |
| Answer» D. a variable | |
| 4. |
For a human eye the minimum viewing angle of resolution should be ʎ⁄D where D is iris opening and ʎ is wavelength of light. |
| A. | True |
| B. | False |
| Answer» C. | |
| 5. |
The rms value of a thermal noise voltage is proportional to (where k is Boltzmann’s constant) _______ |
| A. | √k |
| B. | k |
| C. | k2 |
| D. | k1⁄3 |
| Answer» B. k | |
| 6. |
MARCONI_ANTENNA_________?$ |
| A. | is a grounded antenna |
| B. | is an ungrounded antenna |
| C. | can either be grounded or ungrounded antenna |
| D. | can neither be grounded nor ungrounded antenna |
| Answer» B. is an ungrounded antenna | |
| 7. |
IN_A_VIDICON_CAMERA_TUBE,_THE_SIDE_OF_TARGET_PLATE_FACING_THE_LIGHT_HAS_A_COATING_OF_SNO2_(TIN_OXIDE)_AND_THE_SIDE_FACING_ELECTRON_GUN_HAS_A_COATING_OF_ANTIMONY_TRISULPHIDE.?$ |
| A. | True |
| B. | False |
| Answer» B. False | |
| 8. |
Autocorrelation function of white noise is _______? |
| A. | an impulse function |
| B. | a step function |
| C. | a constant |
| D. | a variable |
| Answer» D. a variable | |
| 9. |
Noises which get generated within the receiver is called ________ |
| A. | Internal noise |
| B. | External noise |
| C. | Man-made noise |
| D. | Extraterrestrial noise |
| Answer» B. External noise | |
| 10. |
In amplitude modulation, magnitude of side bands is ________ times the carrier amplitude. |
| A. | <sup>ma</sup>‚ÅÑ<sub>2</sub> |
| B. | 4ma |
| C. | ma |
| D. | 2ma |
| Answer» C. ma | |
| 11. |
For a human eye the minimum viewing angle of resolution should be  é‚ÅÑD where D is iris opening and  é is wavelength of light.$ |
| A. | True |
| B. | False |
| Answer» C. | |
| 12. |
The rms value of a thermal noise voltage is proportional to (where k is Boltzmann’s constant) _______$ |
| A. | ‚àök |
| B. | k |
| C. | k<sup>2</sup> |
| D. | k<sup><sup>1</sup>‚ÅÑ<sub>3</sub></sup> |
| Answer» B. k | |
| 13. |
Television transmission is possible through ________ |
| A. | DSB-SC |
| B. | SSB-SC |
| C. | VSB |
| D. | AM |
| Answer» D. AM | |
| 14. |
The advantage of using mechanical filter in filter system of sideband suppression is good band pass. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 15. |
The output stage in a television transmitter is likely to be ________ |
| A. | screen modulated |
| B. | plate modulated |
| C. | rectangular modulated |
| D. | grid modulated |
| Answer» E. | |