When a λ/4 transmission line is used for impedance matching, then which of the following is valid?

No standing waves on the λ/4 transmission line

Standing waves are present on the λ/4 transmission line

No standing waves on the λ/4 transmission line

Standing waves are not present both on the feed line and the matching λ/4 line

Standing waves are present on both the feed line and the matching λ/4 line

When a ‚âà√≠¬¨‚Ñ¢/4 transmission line is used for impedance matching, then which of the following is valid?$

No standing waves on the ‚âà√≠¬¨‚Ñ¢/4 transmission line

Standing waves are present on the ‚âà√≠¬¨‚Ñ¢/4 transmission line

No standing waves on the ‚âà√≠¬¨‚Ñ¢/4 transmission line

Standing waves are not present both on the feed line and the matching ‚âà√≠¬¨‚Ñ¢/4 line

Standing waves are present on both the feed line and the matching ‚âà√≠¬¨‚Ñ¢/4 line

Expression for the characteristic impedance of a transmission line(‚âà√≠¬¨‚Ñ¢/4) used for impedance matching is:$

Z1=‚Äö√Ñ√∂‚àö‚Ä†‚àö‚àÇ(Z‚Äö√Ñ√∂‚àö√°‚àö‚â†/R)L

Z1=‚Äö√Ñ√∂‚àö‚Ä†‚àö‚àÇ(Z‚Äö√Ñ√∂‚àö√°‚àö‚â†R)L

Z1=‚Äö√Ñ√∂‚àö‚Ä†‚àö‚àÇ(Z‚Äö√Ñ√∂‚àö√°‚àö‚â†/R)L

Z1=‚Äö√Ñ√∂‚àö‚Ä†‚àö‚àÇ(Z‚Äö√Ñ√∂‚àö√°‚àö‚â†+R)L

20 + Mcqs in Quarter Wave Transformer in Microwave Engineering Page 1 McqOptions

1.	If the transmission co-efficient T₁ of a transmission line is 1.333 and the characteristic impedance of the λ/4 transmission line used is 100Ω, then the characteristic impedance of the transmission line is:
A.	50Ω
B.	100Ω
C.	70.71Ω
D.	None of the mentioned
Answer» B. 100Ω

Discussion

2.	If a transmission line of zₒ=50Ω is matched using λ/4 transmission line of z₁=100Ω, then the transmission co efficient T₂ is:
A.	1
B.	0.6667
C.	1.3333
D.	2
Answer» C. 1.3333

Discussion

3.	When a transmission line of characteristic impedance(50Ω) zₒ is matched to a load by a λ/4 transmission line of characteristic impedance 100Ω, then the transmission co efficient is:
A.	1.5
B.	0.5
C.	1.333
D.	2
Answer» D. 2

Discussion

4.	If the reflection co-efficient of a transmission line is 0.334 with a characteristic impedance of 50Ω then the input impedance of the transmission line is:
A.	100 Ω
B.	50 Ω
C.	150 Ω
D.	None of the mentioned
Answer» B. 50 Ω

Discussion

5.	For a transmission line , if the input impedance of the transmission line is 100Ω with a characteristic impedance of 150Ω, then the magnitude of the reflection co efficient:
A.	0.5
B.	1
C.	0.2
D.	0
Answer» D. 0

Discussion

6.	When a λ/4 transmission line is used for impedance matching, then which of the following is valid?
A.	Standing waves are present on the λ/4 transmission line
B.	No standing waves on the λ/4 transmission line
C.	Standing waves are not present both on the feed line and the matching λ/4 line
D.	Standing waves are present on both the feed line and the matching λ/4 line
Answer» B. No standing waves on the λ/4 transmission line

Discussion

7.	If there is no standing wave on a transmission line, then the value of SWR is:
A.	1
B.	0
C.	Infinity
D.	Insufficient data
Answer» B. 0

Discussion

8.	Expression for the characteristic impedance of a transmission line(λ/4) used for impedance matching is:
A.	Z1=√(ZₒR)L
B.	Z1=√(Zₒ/R)L
C.	Z1=√(Zₒ+R)L
D.	None of the mentioned
Answer» B. Z1=√(Zₒ/R)L

Discussion

9.	If a λ/4 transmission line is 100Ω is used to match a transmission line to a load of 100Ω, then the characteristic impedance of the transmission line is:
A.	100 Ω
B.	50 Ω
C.	70.71 Ω
D.	200 Ω
Answer» B. 50 Ω

Discussion

10.	If a transmission line of characteristic impedance 50 Ω is to be matched to a load of 100Ω, then the characteristic impedance of the ƛ/4 transmission line to be used is:
A.	70.71 Ω
B.	50 Ω
C.	100 Ω
D.	75 Ω
Answer» B. 50 Ω

Discussion

11.	IF_A_TRANSMISSION_LINE_OF_Z‚ÄÖ√Ñ√∂‚ÀÖ√°‚ÀÖ‚Â†=50‚ÂÀ√≠¬¨¬©_IS_MATCHED_USING_‚ÂÀ√≠¬¨‚Ñ¢/4_TRANSMISSION_LINE_OF_Z‚ÄÖ√Ñ√∂‚ÀÖ√°‚ÀÖ√Ñ=100‚ÂÀ√≠¬¨¬©,_THEN_THE_TRANSMISSION_CO_EFFICIENT_T‚ÄÖ√Ñ√∂‚ÀÖ√°‚ÀÖ√°_IS:?$#
A.	1
B.	0.6667
C.	1.3333
D.	2
Answer» C. 1.3333

Discussion

12.	If_the_transmission_co-efficient_T‚Äö√Ñ√∂‚àö√°‚àö√ñ_of_a_transmission_line_is_1.333_and_the_characteristic_impedance_of_the_‚âà√≠¬¨‚Ñ¢/4_transmission_line_used_is_100‚âà√≠¬¨¬©,_then_the_characteristic_impedance_of_the_transmission_line_is:$#
A.	50‚âà√≠¬¨¬©
B.	100‚âà√≠¬¨¬©
C.	70.71‚âà√≠¬¨¬©
D.	None of the mentioned
Answer» B. 100‚âà√≠¬¨¬©

Discussion

13.	When a transmission line of characteristic impedance(50‚âà√≠¬¨¬©) z‚Äö√Ñ√∂‚àö√°‚àö‚â† is matched to a load by a ‚âà√≠¬¨‚Ñ¢/4 transmission line of characteristic impedance 100‚âà√≠¬¨¬©, then the transmission co efficient is?#
A.	1.5
B.	0.5
C.	1.333
D.	2
Answer» D. 2

Discussion

14.	If the reflection co-efficient of a transmission line is 0.334 with a characteristic impedance of 50‚âà√≠¬¨¬© then the input impedance of the transmission line is:$
A.	100 ‚âà√≠¬¨¬©
B.	50 ‚âà√≠¬¨¬©
C.	150 ‚âà√≠¬¨¬©
D.	None of the mentioned
Answer» B. 50 ‚âà√≠¬¨¬©

Discussion

15.	For a transmission line , if the input impedance of the transmission line is 100‚âà√≠¬¨¬© with a characteristic impedance of 150‚âà√≠¬¨¬©, then the magnitude of the reflection co efficient:$
A.	0.5
B.	1
C.	0.2
D.	0
Answer» D. 0

Discussion

16.	When a ‚âà√≠¬¨‚Ñ¢/4 transmission line is used for impedance matching, then which of the following is valid?$
A.	Standing waves are present on the ‚âà√≠¬¨‚Ñ¢/4 transmission line
B.	No standing waves on the ‚âà√≠¬¨‚Ñ¢/4 transmission line
C.	Standing waves are not present both on the feed line and the matching ‚âà√≠¬¨‚Ñ¢/4 line
D.	Standing waves are present on both the feed line and the matching ‚âà√≠¬¨‚Ñ¢/4 line
Answer» B. No standing waves on the ‚âà√≠¬¨‚Ñ¢/4 transmission line

Discussion

17.	If there is no standing wave on a transmission line, then the value of SWR is:
A.	1
B.	0
C.	Infinity
D.	Insufficient data
Answer» B. 0

Discussion

18.	Expression for the characteristic impedance of a transmission line(‚âà√≠¬¨‚Ñ¢/4) used for impedance matching is:$
A.	Z<sub>1</sub>=‚Äö√Ñ√∂‚àö‚Ä†‚àö‚àÇ(Z‚Äö√Ñ√∂‚àö√°‚àö‚â†R)L
B.	Z<sub>1</sub>=‚Äö√Ñ√∂‚àö‚Ä†‚àö‚àÇ(Z‚Äö√Ñ√∂‚àö√°‚àö‚â†/R)L
C.	Z<sub>1</sub>=‚Äö√Ñ√∂‚àö‚Ä†‚àö‚àÇ(Z‚Äö√Ñ√∂‚àö√°‚àö‚â†+R)L
D.	None of the mentioned
Answer» B. Z<sub>1</sub>=‚Äö√Ñ√∂‚àö‚Ä†‚àö‚àÇ(Z‚Äö√Ñ√∂‚àö√°‚àö‚â†/R)L

Discussion

19.	If a ‚âà√≠¬¨‚Ñ¢/4 transmission line is 100‚âà√≠¬¨¬© is used to match a transmission line to a load of 100‚âà√≠¬¨¬©, then the characteristic impedance of the transmission line is:$
A.	100 ‚âà√≠¬¨¬©
B.	50 ‚âà√≠¬¨¬©
C.	70.71 ‚âà√≠¬¨¬©
D.	200 ‚âà√≠¬¨¬©
Answer» B. 50 ‚âà√≠¬¨¬©

Discussion

20.	If a transmission line of characteristic impedance 50 ‚âà√≠¬¨¬© is to be matched to a load of 100‚âà√≠¬¨¬©, then the characteristic impedance of the ‚Äö√†√ú‚àö¬µ/4 transmission line to be used is:
A.	70.71 ‚âà√≠¬¨¬©
B.	50 ‚âà√≠¬¨¬©
C.	100 ‚âà√≠¬¨¬©
D.	75 ‚âà√≠¬¨¬©
Answer» B. 50 ‚âà√≠¬¨¬©

Discussion

Explore topic-wise MCQs in Microwave Engineering.

If the transmission co-efficient T₁ of a transmission line is 1.333 and the characteristic impedance of the λ/4 transmission line used is 100Ω, then the characteristic impedance of the transmission line is:

If a transmission line of zₒ=50Ω is matched using λ/4 transmission line of z₁=100Ω, then the transmission co efficient T₂ is:

When a transmission line of characteristic impedance(50Ω) zₒ is matched to a load by a λ/4 transmission line of characteristic impedance 100Ω, then the transmission co efficient is:

If the reflection co-efficient of a transmission line is 0.334 with a characteristic impedance of 50Ω then the input impedance of the transmission line is:

For a transmission line , if the input impedance of the transmission line is 100Ω with a characteristic impedance of 150Ω, then the magnitude of the reflection co efficient:

When a λ/4 transmission line is used for impedance matching, then which of the following is valid?

If there is no standing wave on a transmission line, then the value of SWR is:

Expression for the characteristic impedance of a transmission line(λ/4) used for impedance matching is:

If a λ/4 transmission line is 100Ω is used to match a transmission line to a load of 100Ω, then the characteristic impedance of the transmission line is:

If a transmission line of characteristic impedance 50 Ω is to be matched to a load of 100Ω, then the characteristic impedance of the ƛ/4 transmission line to be used is:

If_the_transmission_co-efficient_T‚Äö√Ñ√∂‚àö√°‚àö√ñ_of_a_transmission_line_is_1.333_and_the_characteristic_impedance_of_the_‚âà√≠¬¨‚Ñ¢/4_transmission_line_used_is_100‚âà√≠¬¨¬©,_then_the_characteristic_impedance_of_the_transmission_line_is:$#

When a transmission line of characteristic impedance(50‚âà√≠¬¨¬©) z‚Äö√Ñ√∂‚àö√°‚àö‚â† is matched to a load by a ‚âà√≠¬¨‚Ñ¢/4 transmission line of characteristic impedance 100‚âà√≠¬¨¬©, then the transmission co efficient is?#

If the reflection co-efficient of a transmission line is 0.334 with a characteristic impedance of 50‚âà√≠¬¨¬© then the input impedance of the transmission line is:$

For a transmission line , if the input impedance of the transmission line is 100‚âà√≠¬¨¬© with a characteristic impedance of 150‚âà√≠¬¨¬©, then the magnitude of the reflection co efficient:$

When a ‚âà√≠¬¨‚Ñ¢/4 transmission line is used for impedance matching, then which of the following is valid?$

If there is no standing wave on a transmission line, then the value of SWR is:

Expression for the characteristic impedance of a transmission line(‚âà√≠¬¨‚Ñ¢/4) used for impedance matching is:$

If a ‚âà√≠¬¨‚Ñ¢/4 transmission line is 100‚âà√≠¬¨¬© is used to match a transmission line to a load of 100‚âà√≠¬¨¬©, then the characteristic impedance of the transmission line is:$

If a transmission line of characteristic impedance 50 ‚âà√≠¬¨¬© is to be matched to a load of 100‚âà√≠¬¨¬©, then the characteristic impedance of the ‚Äö√†√ú‚àö¬µ/4 transmission line to be used is: