WorksheetsInformation Technologies
Total questions: 10
Worksheet time: 5mins
Analog encoding sends or stores information using quantities that
can vary continuously.
can only have specific values.
are separated by consistent numbers.
store waves’ crest and trough sizes in small steps.
Digital encoding sends or stores information using quantities that
can vary continuously.
can only have specific values.
have no numeric gaps between one another.
create smooth curves inside a sound wave.
A signal is
a radio wave with an unchanging amplitude and frequency.
a radio wave with an unlimited range.
a wave that can only be generated in analog.
anything that carries information and can be detected.
AM and FM radio stations
switch between analog and digital signals to broadcast sound waves.
transmit sound using multiple frequency ranges, including radio waves, visible light, and ultraviolet light.
change the amplitude or frequency of waves to encode sounds.
convert broadcasts into binary code.
Why is the weak analog signal harder to hear?
The weak signal’s sound and clarity decrease corresponding to its amplitude.
Radios have trouble distinguishing between weak signals and random noise.
Increased distance causes wavelengths and frequencies to change.
Radios have trouble connecting with lower-energy waves.
Radio noise is
unwanted, random signals interfering with the intended signal.
a natural result of waves decreasing in energy and amplitude over long distances.
caused by radio receivers being unable to interpret waves with low amplitudes.
intentionally added to radio waves.
Why are digital signals less likely to be affected by noise than analog signals?
There are more sources of analog noise than digital noise.
Digital waves have higher amplitudes, and thus overpower noise
Non-binary noise can be easily filtered out by digital systems.
Analog radios add noise to the signals they receive to improve sound quality.
Why can’t analog radios typically tune into digital signals?
Digital signals are typically too weak for analog radios to pick up.
Digital signals can only be sent through fiber-optic cables, not radio waves.
Analog radios cannot decode the digital signals as sound.
If radios are tuned to the right frequency, digital signals can be heard.
What is the fastest type of network connection?
Ethernet
Mobile data
Fibre optics
Wi-fi
What is the main advantage of using fiber-optic cables for transmitting digital signals?
Fiber-optic cables can transmit analog signals more efficiently.
Fiber-optic cables have a limited range for digital signal transmission.
Fiber-optic cables are less susceptible to interference for digital signals.
Fiber-optic cables can only transmit digital signals in binary code.
