Transmission Lines and Waveguides Objective Questions and Answers

99. The velocity factor of a transmission line

100. When the phase velocity of an electromagnetic wave depends on frequency in any medium, the phenomenon is called

101. consider the following statements regarding a plane wave propagating through free space : The direction of field 1. `E' is perpendicular to the direction of propagation 2. 'H' is perpendicular to the direction of propagation. 3. `E' is perpendicular to the direction of the field 'H'. Which of these statements are correct?

102. A very lossy,M4 long, 500 transmission line is open circuited at the load end. The input impedance measured at the other end of the line is approximately

A. 0

B. 500

C. 0

D. d) none of the above

Discussion

103. A lossless transmission line having 500 characteristic impedance and length X/4 is short circuited at one end and connected to an ideal voltage source of IV at the other end. The current drawn from the voltage source is

104. A (75 ? j50)C2 load is connected to a coaxial transmission line of Zo = 750, at 10 GHz. The best method of matching consists in connecting

A. a short-circuited stub at the load

B. an inductance at the load

C. a capacitance at some specific distance from the load

D. a short-circuited stub at some specific distancp from the load

Discussion

105. A transmission line whose characteristic impedance is a pure resistance

A. must be a lossless line

B. must be a distortionless line

C. may not be a lossless line

D. may not be a distortionless line

Discussion

Electronics Engineering Objective Questions { Transmission Lines and Waveguides }