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WorksheetsTransmission Lines Worksheet Questions (Grade 13)
Total questions: 15
Worksheet time: 8mins
Why is transmission line theory required at high frequencies?
Because current becomes zero
Because lumped circuit assumption fails
Because resistance increases linearly
Because voltage remains constant
A transmission line is mainly used to:
Store electrical energy
Amplify signals
Transfer electrical energy or signals from source to load
Convert AC to DC
Which of the following is an example of a balanced transmission line?
Coaxial cable
Twisted pair
Microstrip line
Single conductor line
Which transmission line is most resistant to external electromagnetic interference?
Open-wire line
Twin-lead line
Twisted pair
Coaxial cable
In a coaxial cable, the electromagnetic field exists mainly:
Outside the outer conductor
Inside the dielectric between conductors
In free space
Only on the surface of the inner conductor
A balanced transmission line has:
One conductor grounded
Equal voltage with respect to ground on both conductors
Different current in each conductor
Only one signal conductor
Which device is commonly used to connect a balanced line to an unbalanced line?
Transformer
Rectifier
Balun
Filter
Which set represents the primary parameters of a transmission line?
Voltage, current, power
R, L, C, G
Z0, VSWR, Γ
α, β, λ
The conductance (G) of a transmission line represents:
Conductor loss
Dielectric loss
Radiation loss
Magnetic loss
Characteristic impedance (Z0) of a lossless transmission line depends on:
Line length
Operating frequency only
R and G only
L and C per unit length
The propagation constant (γ) consists of:
Resistance and reactance
Reflection and transmission
Attenuation constant and phase constant
Voltage and current
Reflection occurs on a transmission line when:
Load impedance equals Z0
Line is infinitely long
Load impedance does not match Z0
Frequency is low
What is the value of VSWR when the load is perfectly matched?
0
0.5
1
∞
The Smith Chart is mainly used to:
Measure voltage directly
Calculate resistance only
Perform impedance matching graphically
Increase signal power
Before plotting impedance on a Smith Chart, it must be:
Converted to current
Normalized with respect to Z0
Converted to frequency
Converted to admittance only
