31. MUF is depend upon A. Electron density of the ionospheric layer B. 11 year sun spot cycle C. Received frequency by receiver D. Height of ionospheric layer 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. The radiation pattern of loop antenna is A. Circle B. Semicircle C. Elliptical D. Cardoid or Limacon 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
33. When a current carrying conductor is brought into magnetic field, the force that moves the conductor depends upon A. The value of current B. The weight of the conductor C. The direction of the conductor 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
34. If a and b are the dimensions of waveguide then A. a = 3b B. a = 2b C. a = b D. $${\text{a}} = \frac{{\text{b}}}{4}$$ 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
35. When a wave is incident from the more dense into a less dense medium at an angle equal to or exceeding the critical angle, the wave suffers total internal __________ . A. Reflection B. Refraction C. Transmission 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
36. Due to which of the following reasons a lightning conductor on top of a building is made into a pointed spike? A. Dust particles may not accumulate B. Charge per unit area becomes very high for lightening to discharge C. Rain drops may not collect 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
37. The useful magnetic flux obtainable from any closed surface is A. Unity B. Constant C. Both A and B D. None 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
38. When the phase velocity of an EM wave depends on frequency in any medium the phenomenon is called A. Scattering B. Polarisation C. Absorption D. Dispersion 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
39. A satellite that simply reflect back the signals from one region of the earth to the other region is known as A. Orbiting satellite B. Geostationary satellite C. Active satellite D. Passive satellite 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
40. The main disadvantage of the two-hole directional coupler is A. Poor directivity B. Narrow bandwidth C. High standing wave ratio D. Low directional coupling 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
