Transmission Lines - Electronic Engineering (MCQ) questions & answers

1)   What would be the depth of penetration for copper at 2 MHz frequency with σ = 5.8 x 107?

a. 46.72 μm
b. 56.90 μm
c. 66.08 μm
d. 76.34 μm
Answer  Explanation 

ANSWER: 46.72 μm

Explanation:
No explanation is available for this question!
2)   What is the phase variation range for reflection coefficient in the transmission lines?

a. 0° to 90°
b. 90° to 150°
c. 0° to 180°
d. 90° to 360°
Answer  Explanation 

ANSWER: 0° to 180°

Explanation:
No explanation is available for this question!
3)   Which lossless element is inserted between source and load in addition to an ideal transformer in order to reduce the effect of reflection loss phenomenon by image matching?

a. Amplitude shifter
b. Phase shifter
c. Frequency divider
d. Voltage divider
Answer  Explanation 

ANSWER: Phase shifter

Explanation:
No explanation is available for this question!
4)   For a transmission line with propagation constant γ = 0.650 + j 2.55, what will be the value of phase velocity for 1 kHz frequency?

a. 1.18 x 103 km/sec
b. 1.50 x 103 km/sec
c. 2.46 x 103 km/sec
d. 4.58 x 103 km/sec
Answer  Explanation 

ANSWER: 2.46 x 103 km/sec

Explanation:
No explanation is available for this question!
5)   Which parameter is much larger than the resistance at radio frequencies in RF circuits?

a. Inductive reactance
b. Capacitive susceptance
c. Shunt conductance
d. Series admittance
Answer  Explanation 

ANSWER: Inductive reactance

Explanation:
No explanation is available for this question!
6)   Which primary constant of transmission line is exhibits its dependency of value on the cross-sectional area of conductors?

a. Resistance (R)
b. Inductance (I)
c. Conductance (G)
d. Capacitance (C)
Answer  Explanation 

ANSWER: Resistance (R)

Explanation:
No explanation is available for this question!
7)   If the rate of attenuation is high for good conductors at radio frequency, where does an input wave get reduced to?

a. Zero
b. Infinity
c. Minor proportion of its initial strength value
d. Major proportion of its final strength value
Answer  Explanation 

ANSWER: Minor proportion of its initial strength value

Explanation:
No explanation is available for this question!
8)   By which phenomenon does the energy transmission take place between the walls of the tube in waveguides?

a. Reflection
b. Refraction
c. Dispersion
d. Absorption
Answer  Explanation 

ANSWER: Reflection

Explanation:
No explanation is available for this question!
9)   Which type of transmission line/s exhibit/s less capacitance in comparison to underground cables?

a. Open-wire
b. Co-axial cables
c. Waveguides
d. All of the above
Answer  Explanation 

ANSWER: Open-wire

Explanation:
No explanation is available for this question!
10)   Which among the following is also regarded as Twin-lead transmission line?

a. Open-wire
b. Underground cable
c. Co-axial cable
d. Waveguide
Answer  Explanation 

ANSWER: Open-wire

Explanation:
No explanation is available for this question!

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