Explore topic-wise MCQs in Microwave Engineering.

This section includes 12 Mcqs, each offering curated multiple-choice questions to sharpen your Microwave Engineering knowledge and support exam preparation. Choose a topic below to get started.

1.

For a transmission line, if the transmission coefficient is 1.4, then the insertion loss in dB is:

A. -2.922dB
B. 29dB
C. 1.46dB
D. -29dB
Answer» B. 29dB
Discussion
2.

If the transmission coefficient of a transmission line is 1.6, then the reflection co efficient is:

A. 0.8
B. 0.6
C. 0.4
D. 0.3
Answer» C. 0.4
Discussion
3.

For a transmission line, if the reflection coefficient is 0.4, then the transmission coefficient is:

A. 0.4
B. 1.4
C. 0.8
D. 2.8
Answer» C. 0.8
Discussion
4.

Expression for a transmission co-efficient of a transmission line is :

A. 2Z<sub>L</sub>/ ( Z<sub>L</sub>+Z<sub>0</sub>)
B. (Z<sub>L</sub>-Z<sub>0</sub>)/ (Z<sub>L</sub>+Z<sub>0</sub>)
C. 2Z<sub>0</sub>/( Z<sub>L</sub>+Z<sub>0</sub>)
D. (Z<sub>L</sub>+Z<sub>0</sub>)/ (Z<sub>L</sub>-Z<sub>0</sub>)
Answer» B. (Z<sub>L</sub>-Z<sub>0</sub>)/ (Z<sub>L</sub>+Z<sub>0</sub>)
Discussion
5.

If a /3 transmission line is open circuited and has characteristic impedance of 50 then the input impedance is:

A. j28.86
B. 50
C. j50
D. 28.86
Answer» B. 50
Discussion
6.

For a /2 transmission line, if the characteristic impedance of the line is 50 and the terminated with a load of 100 , then its input impedance is:

A. 100
B. 50
C. 88.86
D. none of the mentioned
Answer» B. 50
Discussion
7.

Input impedance of a open circuited transmission line is represented using this trigonometric function:

A. sine function
B. cosine function
C. cotangent function
D. tangent function
Answer» D. tangent function
Discussion
8.

Expression for input impedance of an Open circuited transmission line is:

A. -jZ<sub>0</sub>tan l
B. jZ<sub>0</sub>tan l
C. jZ<sub>0</sub>cot l
D. -jZ<sub>0</sub>cot l
Answer» E.
Discussion
9.

If a /3 transmission line is short circuited that has a characteristic impedance of 50 , then its input impedance is:

A. -j100
B. 50
C. 86.60
D. j86.60
Answer» E.
Discussion
10.

Input impedance of a transmission line can be represented in terms of this simple trigonometry function.

A. sine function
B. cosine function
C. cotangent function
D. tangent function
Answer» E.
Discussion
11.

Input impedance of a short circuited transmission line is :

A. -jZ<sub>0</sub>tan l
B. jZ<sub>0</sub>tan l
C. jZ<sub>0</sub>cot l
D. jZ<sub>0</sub>cot l
Answer» C. jZ<sub>0</sub>cot l
Discussion
12.

Expression for input impedance of a transmission line in terms of load impedance and characteristic impedance is:

A. Z<sub>0</sub> (Z<sub>L</sub>+j Z<sub>0</sub>tan l)/ (Z<sub>0</sub>+j Z<sub>L</sub>tan l)
B. (Z<sub>0</sub>+j Z<sub>L</sub>tan l)/ (Z<sub>L</sub>+j Z<sub>0</sub>tan l)
C. Z<sub>0</sub> (Z<sub>L</sub>-j Z<sub>0</sub>tan l)/ (Z<sub>0</sub>-j Z<sub>L</sub>tan l)
D. (Z<sub>0</sub>-j Z<sub>L</sub>tan l)/ (Z<sub>L</sub>-j Z<sub>0</sub>tan l)
Answer» B. (Z<sub>0</sub>+j Z<sub>L</sub>tan l)/ (Z<sub>L</sub>+j Z<sub>0</sub>tan l)
Discussion