# 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*