41. A square corner reflector is used in A. Radio astronomy B. Tv broadcast C. Point to point communication D. All of the above 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
42. In microwave communication links, when fading due to rain attenuation occurs then technique adopted for solving the problem would include A. Antenna replacement and feed correction B. Amplitude timing and phase correction C. Polarization shifting and code diversity D. Path diversity and frequency diversity 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
43. The power gain of a half-wave dipole with respect to an isotropic radiator is A. 2.15 db B. 3 db C. 4.15 db D. 6 db 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
44. MUF is highest in periods of greatest sunspot activity. A. True B. False 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
45. The attenuation in waveguide above to cut off frequency A. Very high B. Very low C. Zero D. Infinite 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
46. A waveguide operated below cut off frequency can be used as A. Phase shifter B. An attenuator C. An isolator D. None 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
47. The wave in wave guide has A. Group velocity inversely proportional to wavelength B. Larger frequency than in the free space C. Diminishing wavelength than in the free space D. Larger wavelength than in the free space 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
48. Radiation intensity in a given direction is the A. Energy radiated per square metre B. Power radiated per square metre C. Power radiated per unit solid angle in that direction 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
49. Which of the following impedance inversion is obtained? A. Short-circuited stub B. A quarter wave line C. Balun transformer D. A half wave line 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
50. When a conductor moves in the field, so that it makes an angle 8 with the lines of flux, the force F is given as : F = Bl sin2 0. A. Yes B. No 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
