WorksheetsQuiz: Transmission Line Basics
Total questions: 26
Worksheet time: 18mins
Which of the following is not considered a conventional transmission line
Twisted pair cable
Optical fiber
Coaxial cable
made of two parallel conductors separated by a space of 1⁄2 in to several inches.
Parallel-Wire lines
Coaxial Cable
Twisted pair
consists of a solid center conductor surrounded by a dielectric material, usually a plastic insulator such as Teflon
Parallel-Wire lines
Coaxial Cable
Twisted pair
consists of a solid center conductor surrounded by a dielectric material, usually a plastic insulator such as Teflon
Parallel-Wire lines
Coaxial Cable
Twisted pair
two insulated solid copper wires covered with insulation and loosely twisted together
Parallel-Wire lines
Coaxial Cable
Twisted pair
Transmission lines can be classified into two types, they are:
Balanced lines
Underbalanced lines
Imbalanced lines
Unbalanced lines
In an unbalanced line, one conductor is not connected to ground
True
False
A balanced line is one in which one wire is connected to ground
True
False
A transmission line where one conductor is connected to ground
balanced line
unbalanced line
coaxial cable
A transmission line in which neither wire is connected to ground
balanced line
unbalanced line
coaxial cable
A transmission line where the signal in each wire is referenced to ground
balanced line
unbalanced line
coaxial cable
Is the length or distance of one cycle of an ac wave or the distance that an ac wave travels in the time required for one cycle of that signal
Radio wave
Wavelength
Frequency
Th formula for wavelength is
fc
cf
cf
Cables used to carry RF energy are not simply resistive conductors but are complex equivalents of
inductors
diode
varistor
resistor
capacitor
For an operating frequency of 500 MHz, what length of a pair of conductors is considered to be a transmission line?
0.06 m
0.6 m
0.006 m
For an operating frequency of 60 Hz, what length of a pair of conductors is considered to be a transmission line?
500 m
500 km
5000 m
For an operating frequency of 250 MHz, what length of a pair of conductors is considered to be a transmission line?
0.12 m
0.012
1.2 m
The parallel conductors form a distributed capacitance with the insulation, which acts as the
resistor
capacitor
dielectric
As the frequency increases the resistance along the transmission line increases, this is due to
skim effect
skin effect
line effect
a function of the inductance, resistance, and capacitance in the circuit
characteristic resistance
characteristic voltage
characteristic impedance
If we assume that the length of the line is infinite, this impedance is
capacitive
resistive
inductive
This is achieved if the load resistance is equal to the characteristic impedance
maximum voltage transfer
maximum power transfer
maximum current transfer
The formula in finding the characteristic impedance is
CL
cL
LC
velocity of propagation of a signal in a cable is greater than the velocity of propagation of light in free space
True
False
Formula for velocity factor
VpVc
ϵ
VcVp
A signal applied at one end of a line appears some time later at the other end of the line.
transit time
time lapsed
time first
