41. A square corner reflector is used in
42. In microwave communication links, when fading due to rain attenuation occurs then technique adopted for solving the problem would include
43. The power gain of a half-wave dipole with respect to an isotropic radiator is
44. MUF is highest in periods of greatest sunspot activity.
45. The attenuation in waveguide above to cut off frequency
46. A waveguide operated below cut off frequency can be used as
47. The wave in wave guide has
48. Radiation intensity in a given direction is the
49. Which of the following impedance inversion is obtained?
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.
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