# Impedance Matching Using Slotted Lines MCQ’s

This set of RF & Microwave Circuit Design Multiple Choice Questions & Answers (MCQs) focuses on “Impedance Matching Using Slotted Lines”.

1. A slotted line can be used to measure _____ and the distance of _____________ from the load.

a) SWR, first voltage minimum

b) SWR, first voltage maximum

c) characteristic impedance, first voltage minimum

d) characteristic impedance, first voltage maximum

2. A modern device that replaces a slotted line is:

a) Digital CRO

b) generators

c) network analyzers

d) computers

3. Slotted line is a transmission line configuration that allows the sampling of:

a) electric field amplitude of a standing wave on a terminated line

b) magnetic field amplitude of a standing wave on a terminated line

c) voltage used for excitation

d) current that is generated by the source

4. If the standing wave ratio for a transmission line is 1.4, then the reflection coefficient for the line is:

a) 0.16667

b) 1.6667

c) 0.01667

d) 0.96

5. Expression for ϴ means phase angle of the reflection co efficient r=|r|-e^jθ, the phase of the reflection co-efficient is:

a) θ=2π+2βL_{min}

b) θ=π+2βL_{min}

c) θ=π/2+2βL_{min}

d) θ=π+βL_{min}

6. If SWR=1.5 with a wavelength of 4 cm and the distance between load and first minima is 1.48cm, then the reflection coefficient is:

a) 0.0126+j0.1996

b) 0.0128

c) 0.26+j0.16

d) none of the mentioned

7. If the reflection coefficient of a transmission line is 0.4, then the standing wave ratio is:

a) 1.3333

b) 2.3333

c) 0.4

d) 0.6

8. In the expression for phase of the reflection coefficient, L_{min} stands for :

a) distance between load and first voltage minimum

b) distance between load and first voltage maximum

c) distance between consecutive minimas

d) distance between a minima and immediate maxima

9. If the characteristic impedance of a transmission line 50 Ω and reflection coefficient is 0.0126+j0.1996, then load impedance is:

a) 47.3+j19.7Ω

b) 4.7+j1.97Ω

c) 0.26+j0.16

d) data insufficient

10. If the normalized load impedance of a transmission line is 2, then the reflection co-efficient is:

a) 0.33334

b) 1.33334

c) 0

d) 1