# Lumped Element Circuit Model of Transmission Line

This set of RF & Microwave Circuit Design Multiple Choice Questions & Answers (MCQs) focuses on “Lumped Element Circuit Model of Transmission Line”.

1. Transmission line is a _________ parameter network.

a) lumped

b) distributed

c) active

d) none of the mentioned

2. For transverse electromagnetic wave propagation, we need a minimum of:

a) 1 conductor

b) 2 conductors

c) 3 conductors

d) bunch of conductors

3. The key difference between circuit theory and transmission line theory is:

a) circuit elements

b) voltage

c) current

d) electrical size

4. To model a transmission line of infinitesimal length Δz, the lumped element that is not used is:

a) resistor

b) inductor

c) capacitor

d) transistor

5. _________ and __________ contribute to the admittance of a transmission line in the lumped element representation.

a) conductance G, capacitor

b) conductance, inductor

c) resistor, capacitor

d) resistor, inductor

6. Propagation constant γ is a :

a) real value

b) none of the mentioned

c) imaginary value

d) complex value

7. _________ and __________ contribute to the impedance of a transmission line in the lumped element representation.

a) resistor, inductor

b) resistor, capacitor

c) capacitor, inductor

d) transistor, capacitor

8. Characteristic impedance of a transmission line is:

a) impedance Z of a transmission line

b) impedance which is a constant at any point on the transmission line

c) reciprocal of admittance of a transmission line

d) none of the mentioned

9. Attenuation constant α signifies:

a) real part of propagation constant

b) loss that the transmission line causes

c) none of the mentioned

d) all of the mentioned

10. Characteristic impedance Zₒ is given by:

a) √Z/Y

b) √ZY

c) √Z+√Y

d) √Z-√Y

11. Propagation constant γ is given by:

a) α+jβ

b) α-jβ

c) α/jβ

d) α.jβ

12. Propagation constant γ in terms of admittance and impedance of the transmission line is:

a) √Z/Y

b) √ZY

c) ZY

d) ZY*