MCQs in Radiation and Wave Propagation Part IV - Answers

Answers key for the Compiled MCQs in Radiation and Wave Propagation Part 4 of the series as one topic in Electronic System and Technologies (Communications Engineering) in the ECE Board Exam.

Answers in Radiation and Wave Propagation - MCQs Part IV

Below are the answers key for the Multiple Choice Questions in Radiation and Wave Propagation - MCQs Part 4.

151. Tropospheric ducting

152. It is more pronounced at wide bandwidths

153. By approximately 15% of the distance

154. -6

155. Propagation between two points at approximately the same distance north and south of the magnetic equator

156. Both a and b above

157. 30 miles

158. 2.12 mV/m

159. E layer

160. Kinetic energy is given up by the radio wave

161. 243 ohms

162. About 5000 miles

163. 190 mV/m

164. 1.4

165. A fading caused by phase difference between radio wave components of the same transmission as experienced at the receiving station

166. Approximately 500 miles

167. Radio waves may be bent

168. 80 kW

169. Phase differences between the radio waves components of the same transmission as experienced in the receiving station

170. 5775 kHz

171. Selective fading

172. Afternoon or early evening

173. 21.5 GW/ sq. m

174. Allows normally line-of-sight signals to bend around sharp edges, mountain ridges, building and other obstruction

175. 1.59 W/sq m

176. Knife-edge diffraction

177. 7 degrees

178. 2.6 dB

179. A fixed point in an electromagnetic wave

180. The electric field rotates

181. 7.5 ms

182. Horizontal

183. Approximately 300 million meters per second

184. 51.355 MHz

185. A wave consisting of an electric field and a magnetic field at right angles to each other

186. Vertical

187. 0.936

188. The electric field is parallel to the earth

199. Because of eddy currents

190. 680 nW

191. 25.5 MHz

192. Vertical

193. 0.509

194. Horizontal

195. Very high and ultra high frequencies

196. Refracted

197. Increase antenna height

198. Repeater

199. 25.7 km

200. Direct wave

Online Questions and Answers Series

Following is the list of Practice Exam Test Questions in this brand new series:

Radiation and Wave Propagation MCQs
PART 1: MCQs from Number 1 – 50                        Answer key: PART I
PART 2: MCQs from Number 51 – 100                   Answer key: PART II
PART 3: MCQs from Number 101 – 150                 Answer key: PART III
PART 4: MCQs from Number 151 – 200                 Answer key: PART IV
PART 5: MCQs from Number 201 – 250                 Answer key: PART V
PART 6: MCQs from Number 251 – 300                 Answer key: PART VI
PART 7: MCQs from Number 301 – 350                 Answer key: PART VII
PART 8: MCQs from Number 351 – 400                 Answer key: PART VIII

Complete List of MCQs in Communications Engineering per topic


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