31. To eliminate ghosts in the picture A. Use a longer transmission line B. Connect a booster C. Change the antenna orientation of location D. Twist the transmission line 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
32. Circular polarization A. Is useful in reducing depolarization effect on received wave B. Involves critical alignment of transmitting and receiving antenna C. Is useful in discrimination between reception of adjacent beams 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
33. If in a broadcasting studio, a 1000 kHz carrier is modulated by an audio signal of frequency range 100-5000 kHz, the width of channel is __________ kHz. A. 5 B. 4.9 C. 995 D. 10 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
34. In Modulation, “carrier” is A. Resultant wave B. Speech voltage to be transmitted C. Voltage with constant frequency, phase or amplitude D. Voltage for which frequency, phase or amplitude is varied 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. For a plate-modulated class C amplifier the plate supply voltage is E. The maximum plate cathode voltage could be almost high as A. 2E B. 3E C. 4E D. 6E 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
36. A cordless telephone using separate frequencies for transmission in base and portable units is known as A. Duplex arrangement B. Half duplex arrangement C. Either A or B D. Neither A nor B 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
37. In TV systems, equalising pulses are sent during A. Horizontal blanking B. Vertical blanking C. Serrations D. Horizontal retrace 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
38. For a given carrier wave, maximum undistorted power is transmitted when value of modulation is A. 1 B. 0.8 C. 0.5 D. 0 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
39. The modulation index of an FM is changed from 0 to 1. How does the transmitted power change? A. Gets halved B. Gets doubled C. Gets increased by 50 percent D. Remains unchanged 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
40. The maximum power output of a standard A earth station over the total band allocated to satellite communication is about A. 0.5 kW B. 8 kW C. 20 kW D. 50 kW 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
