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Assignment Questions - 14182_249
Assignment Questions - 14182_251

Neets Module 10-Introduction to Wave Propagation, Transmission Lines, and Antennas
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6 1-48.   In a comparison of waves of light and sound as they travel from an air into water, how is the speed of (a) light waves and (b) sound waves affected? 1.   (a) Increased (b) increased 2.   (a) Increased (b) decreased 3.   (a) Decreased (b) decreased 4.   (a) Decreased (b) increased 1-49.   Which of the following waves are NOT a form of electromagnetic energy? 1.   Heat waves 2.   Sound waves 3.   Light waves 4.   Radio waves 1-50.   The electromagnetic spectrum represents the entire range of electromagnetic waves arranged in the order of their 1.   color 2.   frequency 3.   visibility 4.   application 1-51.   Which of the following portions of the frequency spectrum contains the highest frequency? 1.   X-ray 2.   Radar 3.   Light 4.   Cosmic 1-52.   Which of the following electronic devices is used to radiate and/or collect electromagnetic waves? 1.   Antenna 2.   Receiver 3.   Transmitter 4.   Transmission line 1-53.   The electric field and magnetic field combine to form which of the following types of waves? 1.   Spherical 2.   Elliptical 3.   Electromagnetic 4.   Each of the above 1-54.   The magnetic field radiated from an antenna is produced by what electrical property? 1.   Voltage 2.   Current 3.   Reactance 4.   Resistance 1-55.   The electric field radiated from an antenna is produced by what electrical property? 1.   Voltage 2.   Current 3.   Reactance 4.   Resistance 1-56.   Applying rf energy to the elements of an antenna results in what phase relationship between voltage and current? 1.   Voltage lags current by  90 degrees 2.   Voltage leads current by 90 degrees 3.   Voltage and current are 180 degrees out of phase 4.   Voltage and current are in phase 1-57.   What field exists close to the conductor of an antenna and carries the current? 1.   Electric 2.   Magnetic 3.   Induction 4.   Radiation






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