Basic Science : Television QUESTIONS AND ANSWERS :: part1 : 11 to 15
Following Basic Science multiple choice objective type questions and answers will help you in many types of 2024 job and other entrance examinations :
11.The photosensitive plate of an Iconoscope is known as |
| mosaic |
| camera |
| grid |
| electron gun |
12.Scanning is |
| the process in which light audio frequency variations are converted into voltage variations |
| the process in which light intensity is converted into variations in potentials |
| done by a beam of positive rays |
| the process in which audio frequency variations are converted into corresponding video frequency variations |
13.In television broadcasting, video signals are produced using |
| an oscillator |
| a microphone |
| a loud speaker |
| an iconoscope |
14.In an iconoscope, in scanning the image, during the blanking period, the grid control is supplied with a |
| low negative potential |
| high negative potential |
| high positive potential |
| low positive potential |
15.In TV transmission, the sound waves are transmitted by |
| phase modulation |
| frequency modulation |
| amplitude modulation |
| amplitude or phase modulation |
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