31. In India, ___________ modulation is used for radio transmission A. Frequency B. Amplitude C. Phase D. None of the above Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
32. When the modulating signal controls the frequency of the carrier, we get___________ A. Phase modulation B. Amplitude modulation C. Frequency modulation D. May be any one of the above Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option C No explanation is given for this question Let's Discuss on Board
33. In an AM wave useful power is carrier by ___________ A. Carrier B. Sidebands C. Both sidebands and carrier D. None of the above Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
34. In a radio receiver, we generally use ___________ oscillator as a local oscillator A. Crystal B. Wien-bridge C. Phase-shift D. Hartley Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option D No explanation is given for this question Let's Discuss on Board
35. In radio transmission, the medium of transmission is ___________ A. Space B. An antenna C. Cable D. None of the above Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option A No explanation is given for this question Let's Discuss on Board
36. In superhetrodyne receiver, the input at mixer stage is ___________ A. IF and RF B. RF and AF C. IF and AF D. RF and local oscillator signal Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option D No explanation is given for this question Let's Discuss on Board
37. Overmodulation results in ___________ A. Weakening of the signal B. Excessive carrier power C. Distortion D. None of the above Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option C No explanation is given for this question Let's Discuss on Board
38. The letters AVC stand for ___________ A. Audio voltage control B. Abrupt voltage control C. Automatic volume control D. Automatic voltage control Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option C No explanation is given for this question Let's Discuss on Board
39. In a TRF radio receiver, the RF and detection stages are tuned to ___________ A. Radio frequency B. IF C. Audio frequency D. None of the above Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option A No explanation is given for this question Let's Discuss on Board
40. The IF is 455 kHz. If the radio receiver is tuned to 855 kHz, the local oscillator frequency is ___________ A. 455 kHz B. 1310 kHz C. 1500 kHz D. 1520 kHz Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
