Transmission Media Quiz

RG-59 foam has a characteristic impedance of:

• 52Ω

• 50Ω

• 73Ω

• 75Ω

What is the main function of transmission media in a communication system?

• To generate signals

• To transmit data from one place to another

• To store data

• To receive data

The rate at which the periodic wave repeats.

• Frequency

• Period

• Wavelength

• Speed

The ratio between voltage and current on an infinitely long transmission line.

• Resistance

• Reactance

• Impedance

• Propagation velocity

A medium most widely used in LANs?

• Twisted pair

• Parallel-wire line

• Fiber-optic cable

• Coaxial

Impedance of open-wire lines are often ____ or ____.

• 50Ω, 73Ω

• 120Ω, 300Ω

• 159Ω, 500Ω

• 600Ω, 900Ω

A type of parallel conductor transmission lines consists of simply of two parallel wires, closely spaced and separated by air

• Coaxial cables

• Twisted pair

• Open-wire lines

• Twin lead

The dielectric constants of materials commonly used in transmission lines range from about

• 1.0 to 1.2

• 1.2 to 2.8

• 2.8 to 3.5

• 3.5 to 5.2

What is the transmission and reception of information?

• Modulation

• Communications

• Radiation

• Emission

Typically, the velocity factor of the materials used in transmission lines range from

• 0.1 to 0.5

• 0.6 to 1.5

• 0.6 to 0.9

• 1.0 to 0.9