Standing Waves MCQs : This section focuses on the "Standing Waves". These Multiple Choice Questions (MCQs) should be practiced to improve the Standing Waves skills required for various interviews (campus interview, walk-in interview, company interview), placement, entrance exam and other competitive examinations.
Question 1
How would the graph of wavelength vs voltage look like if the transmission line is matched (neglect resistive loss)?
A. Linearly increasing
B. Linearly decreasing
C. Exponentially decreasing
D. Constant
Question 2
In an unmatched line the actual signal on the line is ___________
A. The sum of forward and reflected signals
B. The difference of forward and reflected signals
C. The product of forward and reflected signals
D. The modulus of forward signal
Question 3
The ratio of the incident voltage wave Vi to the reflected voltage wave Vr is called the reflection coefficient.
A. True
B. False
Question 4
The transmission line in which the resistive impedance is equal to the characteristic impedance is called _____
A. Matched lines
B. Paralleled lines
C. Balanced lines
D. Unbalanced lines
Question 5
What is the load on a transmission line?
A. 0 Ω
B. Infinity
C. Some value between 0 and infinity
D. Some value between0 and 1
Question 6
What is the reflection coefficient If a line is terminated in its characteristic impedance?
A. 0
B. Infinity
C. 2
D. 0.5
Question 7
What is the resistive load if SWR= 3.05 and Zo =75Ω?
A. 1.23Ω
B. 51.23Ω
C. 254.2Ω
D. 24.59Ω
Question 8
What is the Standing wave ratio if a 75Ω antenna load is connected to a 50Ω transmission line?
A. 1
B. 2
C. 1.5
D. 1.43
Question 9
What percentage of power is reflected if the reflection coefficient is 0.5?
A. 50%
B. 75%
C. 25%
D. 12%
Question 10
Which of the following does not cause standing waves?
A. Short circuit
B. Open circuit
C. High frequency high power signal
D. Impedance is not matched
Question 11
Which of the following is not true regarding standing wave?
A. In a standing wave the energy moves towards the power source
B. In a standing wave power loss occurs
C. Standing waves do not affect signal strength
D. Standing waves are not desirable