Ground Wire and Signal Wires Quiz

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What is a primary disadvantage of unbalanced transmission lines?

More complicated installation process

Reduced immunity to common-mode signals (correct)

Higher cost compared to balanced lines

Lower data transfer rates

Why does a small potential difference exist between any two points on the ground wire?

Improper grounding techniques

Presence of transformers

High frequency signals

Resistance, inductance, and capacitance of the wire (correct)

Which type of transmission line requires only one ground line no matter how many signals are grouped into one conductor?

Twisted pair transmission lines

Unbalanced transmission lines (correct)

Balanced transmission lines

Coaxial transmission lines

What circuit device is used to connect a balanced transmission line to an unbalanced load?

Balun Signup and view all the answers

How can an unbalanced coaxial transmission line be connected to a balanced load like an antenna?

Using a transformer with an unbalanced primary and center-tapped secondary winding Signup and view all the answers

What is the primary advantage of unbalanced transmission lines over balanced ones?

Requiring only one wire for each signal Signup and view all the answers

In a balanced wire pair, common-mode interference induces noise equally in both wires, resulting in:

Longitudinal currents that cancel in the load Signup and view all the answers

What is the term used to describe the cancellation of common-mode signals in a balanced transmission line?

Common-mode rejection Signup and view all the answers

What is a key requirement for a pair of wires to operate in balanced mode?

Neither wire is at ground potential Signup and view all the answers

What is the primary difference between a balanced transmission line and an unbalanced transmission line?

Ground potential of one wire Signup and view all the answers

Why is the shield of a coaxial cable connected to ground?

To prevent static interference from reaching the center conductor Signup and view all the answers

What does the term 'single-ended signal transmission' refer to?

One wire is at ground potential while the other carries the signal Signup and view all the answers

What is the main difference between balanced and unbalanced transmission lines?

Balanced lines have both conductors carrying current in opposite directions, while unbalanced lines have only one conductor carrying current. Signup and view all the answers

In a balanced transmission line system, how are the signal currents distributed?

Equal in magnitude with respect to electrical ground and flow in opposite directions. Signup and view all the answers

What defines differential (balanced) signal transmission on a two-wire balanced line?

The potential difference between the two wires carrying the signal. Signup and view all the answers

Why are balanced transmission lines less susceptible to external interference compared to unbalanced lines?

Because balanced lines have metallic circuit currents flowing in opposite directions cancelling out external noise better. Signup and view all the answers

What characteristic of a transverse wave indicates the displacement and velocity as it propagates down a transmission line?

Differential signal Signup and view all the answers

When measuring voltage in a balanced transmission line, why does it fluctuate from zero to maximum positive, back to zero, and then to maximum negative?

Due to the alternating signal propagation between the two wires carrying potential difference. Signup and view all the answers