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| Q. |
The audio signals of TV are : |
| A. | Amplitude modulated |
| B. | Frequency modulated |
| C. | Unmodulated |
| D. | Velocity modulated |
| Answer» B. Frequency modulated | |
| Explanation: In telecommunications and signal processing, frequency modulation (FM) conveys information over a carrier wave by varying its instantaneous frequency. This contrasts with amplitude modulation, in which the amplitude of the carrier is varied while its frequency remains constant. In analogue television, the sound portion of a broadcast is invariably modulated separately from the video. | |
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