Explore topic-wise MCQs in Microwave Engineering.

This section includes 18 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.

If the normalized load impedance of a transmission line is 0.3-j0.4 with a characteristic impedance of 50 Ω, then the load impedance is:

A. 15-j20
B. 15+j20
C. 1-j
D. 0.3-0.4j
Answer» B. 15+j20
Discussion
2.

If a transmission line of a characteristic impedance 100 Ω is terminated with a load impedance of 300+j200 Ω, then the normalized load impedance is:

A. 1+j
B. 1-j
C. 3+2j
D. 2-3j
Answer» D. 2-3j
Discussion
3.

Normalized impedance of 1-j is:

A. In the upper half of the impedance smith chart
B. In the Lower half of the impedance smith chart
C. On the outer most circle of the smith chart.
D. On the horizontal line of the smith chart
Answer» C. On the outer most circle of the smith chart.
Discussion
4.

If the input impedance of a ƛ/2 transmission line is 100 Ω with a voltage reflection coefficient of 0.344, then the characteristic impedance of the transmission line is:

A. 200 Ω
B. 100 Ω
C. 50 Ω
D. None of the mentioned
Answer» B. 100 Ω
Discussion
5.

If the normalized input impedance of a transmission line is 0.5 Ω, then he reflection coefficient of a ƛ/2 transmission line is

A. 0.3334
B. 0.5
C. 0.6667
D. 1
Answer» B. 0.5
Discussion
6.

If the characteristic impedance of a ƛ/2 transmission line is 50 Ω and reflection coefficient 0.3, then its input impedance

A. 26.92 Ω
B. 30 Ω
C. 40 Ω
D. 34.87 Ω
Answer» B. 30 Ω
Discussion
7.

Any passively realizable reflection coefficient can be plotted as a unique point on the smith chart. This statement implies that:

A. Reflection co-efficient less than or equal to 1 can be plotted
B. Reflection co-efficient greater than or equal to 1 can be plotted
C. Transmission co-efficient has to be less than or equal to one for the point to be located
D. T=Г+1
Answer» B. Reflection co-efficient greater than or equal to 1 can be plotted
Discussion
8.

IF_THE_NORMALIZED_LOAD_IMPEDANCE_OF_A_TRANSMISSION_LINE_IS_0.3-J0.4_WITH_A_CHARACTERISTIC_IMPEDANCE_OF_50_‚ÂÀ√≠¬¨¬©,_THEN_THE_LOAD_IMPEDANCE_IS:?$#

A. 15-j20
B. 15+j20
C. 1-j
D. 0.3-0.4j
Answer» B. 15+j20
Discussion
9.

IF_A_TRANSMISSION_LINE_OF_A_CHARACTERISTIC_IMPEDANCE_100_‚ÂÀ√≠¬¨¬©_IS_TERMINATED_WITH_A_LOAD_IMPEDANCE_OF_300+J200_‚ÂÀ√≠¬¨¬©,_THEN_THE_NORMALIZED_LOAD_IMPEDANCE_IS:?$#

A. 1+j
B. 1-j
C. 3+2j
D. 2-3j
Answer» D. 2-3j
Discussion
10.

To get an admittance chart from an impedance chart:$

A. Smith chart has to be rotated by 90‚Äö√Ö‚àû
B. Smith chart has to be rotated by 180‚Äö√Ö‚àû
C. Admittance chart cannot be obtained from the impedance chart anyway.
D. None of the mentioned
Answer» C. Admittance chart cannot be obtained from the impedance chart anyway.
Discussion
11.

Normalized impedance of 1-j is?

A. In the upper half of the impedance smith chart
B. In the Lower half of the impedance smith chart
C. On the outer most circle of the smith chart.
D. On the horizontal line of the smith chart
Answer» C. On the outer most circle of the smith chart.
Discussion
12.

Normalized impedance of 0.3+j0.4 lies in the:

A. Upper half of the impedance smith chart
B. Lower half of the impedance smith chart
C. Horizontal line of the chart
D. None of the mentioned
Answer» B. Lower half of the impedance smith chart
Discussion
13.

If the input impedance of a ƛ/2 transmission line is 100 Ω with a voltage reflection coefficient of 0.344, then the characteristic impedance of the transmission line is:$

A. 200 Ω
B. 100 Ω
C. 50 Ω
D. None of the mentioned
Answer» B. 100 ‚âà√≠¬¨¬©
Discussion
14.

If the normalized input impedance of a transmission line is 0.5 Ω, then he reflection coefficient of a ƛ/2 transmission line is$

A. 0.3334
B. 0.5
C. 0.6667
D. 1
Answer» B. 0.5
Discussion
15.

If the characteristic impedance of a ƛ/2 transmission line is 50 Ω and reflection coefficient 0.3, then its input impedance$

A. 26.92 Ω
B. 30 Ω
C. 40 Ω
D. 34.87 Ω
Answer» B. 30 ‚âà√≠¬¨¬©
Discussion
16.

Reflection coefficient of a transmission line in its polar form can be represented as:

A. ┌=|┌|e<sup>jθ</sup>
B. ┌=|┌|e<sup>jθ-1</sup>
C. ┌=|┌|e<sup>jθ+1</sup>
D. ┌=|┌|e<sup>jθ+α</sup>
Answer» B. ‚Äö√Ñ√∂‚àö√Ü‚àö‚Ä¢=|‚Äö√Ñ√∂‚àö√Ü‚àö‚Ä¢|e<sup>j‚âà√≠‚Äö√†√®-1</sup>
Discussion
17.

Any passively realizable reflection coefficient can be plotted as a unique point on the smith chart. This statement implies that:

A. Reflection co-efficient less than or equal to 1 can be plotted
B. Reflection co-efficient greater than or equal to 1 can be plotted
C. Transmission co-efficient has to be less than or equal to one for the point to be located
D. T=–ì+1
Answer» B. Reflection co-efficient greater than or equal to 1 can be plotted
Discussion
18.

Smith chart is based on the polar plot of:

A. Reactance
B. Voltage
C. Current
D. Voltage reflection co-efficient
Answer» E.
Discussion