Top 150+ Solved Radiation and Microwave Techniques MCQ Questions Answer

From 46 to 60 of 168

Q. The klystron tube used in a klystron amplifier is a _________ type beam amplifier.

a. linear beam

b. crossed field

c. parallel field

d. none of the mentioned

  • a. linear beam

Q. A PIN diode consists of ______number of semiconductor layers.

a. three

b. two

c. four

d. one

  • a. three

Q. The resistance of the PIN diode with positive bias voltage:

a. increases

b. decreases

c. remains constant

d. insufficient data

  • b. decreases

Q. Microstrip line can support a pure TEM wave.

a. true

b. false

c. microstrip supports only tm mode

d. microstrip supports only te mode

  • b. false

Q. The arcs of circles on smith chart represent

a. normalised resistance or conductance

b. different values of swr

c. normalised reactance or susceptance

d. none of the above

  • c. normalised reactance or susceptance

Q. The characteristic impedance of a transmission line is

a. directly proportional to its length

b. inversely proportional to its length

c. independent of its length

d. none of the above

  • c. independent of its length

Q. Standing wave ratio (SWR) equal to unity implies that

a. the transmission line is open circuited

b. the transmission line is short circuited

c. the transmission line\s characteristic impedance equals load impedance

d. none of the above

  • c. the transmission line\s characteristic impedance equals load impedance

Q. ), The normalised load impedance is

a. (1 + j 2)

b. (2500 + j 5000)

c. (0.5 +j)

d. none of the above

  • a. (1 + j 2)

Q. V and a conduction current of 1.2A is

a. 25.2

b. 22.8

c. 28.8

d. 20

  • d. 20

Q. and 9 respectively is

a. 25

b. 1.33

c. 7

d. 0.75

  • b. 1.33

Q. V. The SWR is

a. 0.67

b. 1.2

c. 1

d. 1.5

  • d. 1.5

Q. pF/m and an inductance of 75 nH/m

a. 5 ohm

b. 50 ohm

c. 500 ohm

d. 5000 ohm

  • b. 50 ohm
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