Quarter Wave Transformer MCQ

Test your knowledge with important Quarter Wave Transformer MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30 + more Quarter Wave Transformer MCQs at Bissoy

• 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:
  ক

  50Ω

  খ

  100Ω

  গ

  70.71Ω

  ঘ

  None of the mentioned
• If a transmission line of zₒ=50Ω is matched using λ/4 transmission line of z₁=100Ω, then the transmission co efficient T₂ is:
  ক

  1

  খ

  0.6667

  গ

  1.3333

  ঘ

  2
• 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:
  ক

  1.5

  খ

  0.5

  গ

  1.333

  ঘ

  2
• 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:
  ক

  100 Ω

  খ

  50 Ω

  গ

  150 Ω

  ঘ

  None of the mentioned
• 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:
  ক

  0.5

  খ

  1

  গ

  0.2

  ঘ

  0
• When a λ/4 transmission line is used for impedance matching, then which of the following is valid?
  ক

  Standing waves are present on the λ/4 transmission line

  খ

  No standing waves on the λ/4 transmission line

  গ

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

  ঘ

  Standing waves are present on both the feed line and the matching λ/4 line
• If there is no standing wave on a transmission line, then the value of SWR is:
  ক

  1

  খ

  0

  গ

  Infinity

  ঘ

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

  Z1=√(ZₒR)L

  খ

  Z1=√(Zₒ/R)L

  গ

  Z1=√(Zₒ+R)L

  ঘ

  None of the mentioned
• 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:
  ক

  100 Ω

  খ

  50 Ω

  গ

  70.71 Ω

  ঘ

  200 Ω
• 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:
  ক

  70.71 Ω

  খ

  50 Ω

  গ

  100 Ω

  ঘ

  75 Ω