WorksheetsTransmission Media Quiz ICE 3203
Total questions: 20
Worksheet time: 3mins
Which parameter has the most significant impact on the attenuation of a signal in a transmission medium?
Data rate
Frequency of the signal
Transmission distance
Modulation technique
In twisted-pair cables, increasing the number of twists per unit length primarily helps to:
Improve signal strength
Reduce crosstalk and electromagnetic interference
Increase bandwidth capacity
Enhance attenuation resistance
The dominant factor that limits the bandwidth of a multimode fiber-optic cable is:
Chromatic dispersion
Modal dispersion
Attenuation
Polarization mode dispersion
What is the primary reason that single-mode fiber-optic cables are preferred for long-distance communication?
Lower cost compared to multimode fiber
Higher attenuation
Elimination of modal dispersion
Easier installation
In coaxial cables, the shielding layer serves the primary purpose of:
Increasing bandwidth capacity
Reducing signal reflection
Preventing external electromagnetic interference
Supporting higher frequency transmission
The skin effect in guided transmission media refers to:
Increased resistance at lower frequencies
Attenuation caused by dielectric materials
Tendency of high-frequency signals to travel near the surface of a conductor
The absorption of signals by surrounding media
Which factor does NOT directly affect the propagation speed of a signal in a guided transmission medium?
The material's refractive index
Signal frequency
Temperature variations
Length of the transmission medium
Why do fiber-optic cables experience chromatic dispersion?
Differences in propagation speeds of different wavelengths of light
Interference from external electromagnetic sources
Bending of light waves due to refraction
The transmission of multiple signals at once
The characteristic impedance of a transmission line is a function of:
Signal frequency and amplitude
The inductance and capacitance per unit length
The type of signal modulation used
The transmission distance
Which of the following is the biggest disadvantage of using wireless transmission compared to guided media?
Limited transmission range
Higher error rates due to environmental factors
Inability to support broadband communication
Lower signal propagation speed
Which of the following correctly describes the Fresnel zone in wireless transmission?
The region of a signal that experiences the least attenuation
The elliptical area around the line-of-sight path that should remain unobstructed for optimal signal propagation
The boundary between guided and unguided transmission
The layer of the atmosphere that reflects radio signals back to Earth
In fiber optics, what role does the numerical aperture (NA) play?
Determines the bending tolerance of the fiber
Defines the range of angles at which light can enter the core and be guided
Controls the data rate of transmission
Regulates the signal attenuation over long distances
In radio wave transmission, what is the primary reason for multipath interference?
Electromagnetic interference from other sources
The presence of multiple antennas
Signals reflecting off surfaces and arriving at the receiver at different times
Poor modulation techniques
The Shannon capacity formula, which determines the theoretical maximum data rate for a transmission channel, depends on which two parameters?
Bandwidth and signal power
Bandwidth and noise level
Bandwidth and signal-to-noise ratio (SNR)
Signal power and modulation technique
The cut-off frequency in waveguides refers to:
The frequency at which attenuation becomes negligible
The maximum frequency that can be transmitted
The minimum frequency that can propagate without attenuation
The resonance frequency of the medium
Which of the following is an advantage of radio wave transmission over microwave transmission?
Higher data rate
Less susceptibility to interference
Greater ability to penetrate obstacles
Requires line-of-sight for transmission
The relationship between wavelength (λ), frequency (f), and propagation speed (v) in a transmission medium is given by:
λ = v × f
v = λ × f
f = λ / v
λ = f / v
Which statement best describes the relationship between bandwidth and transmission distance in fiber-optic cables?
Higher bandwidth allows for longer transmission distances
Increasing bandwidth leads to higher dispersion, limiting transmission distance
Bandwidth is independent of transmission distance
Fiber-optic cables have an unlimited bandwidth-distance product
What is the primary reason that wireless signals experience greater attenuation than guided media?
The need for higher transmission power
Signal absorption, scattering, and interference in the atmosphere
The lack of a physical transmission medium
The use of lower-frequency signals
Which transmission impairment occurs when different frequency components of a signal travel at different speeds?
Attenuation
Phase distortion
Group delay distortion
Crosstalk
