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WorksheetsModule 3
Total questions: 20
Worksheet time: 10mins
Light waves, radio waves, and microwaves are examples of electromagnetic waves.
True
false
Analog signals are ___________affected by noise than digital signals.
less
more
Light waves stay inside an optical fiber as they are transmitted because the ________.
fiber is perfectly straight
fiber reflects the light back into the core
fiber is insulated to prevent loss of thermal energy
light waves curve to follow the path of the fiber
Which do NOT interfere with FM radio transmissions?
mountains
buildings
bad weather
AM Transmissions
Which is an example of a signal being encoded?
reading braille
writing a word in Morse code
hearing a sound from a radio
receiving an email
Which does NOT help explain why digital signals are more reliable than analog signals?
Noise is more easily filtered from digital signals
Digital signals are smooth and continuous
Digital signals consist of two values
Analog signals deteriorate due to nose
Computers use digital information that is encoded as ___________ numbers.
digital
binary
complicated
nondigitized
Digital signals _____________.
can only be stored on computers
consist of only two values
cannot be transmitted by light waves
are what is stored by camera film
Which best explains why the receiver of a signal must understand the code or language being used?
This allows the signal to be decoded.
This allows the signal to be transmitted.
This allows the signal to be converted to binary.
This allows the signal to be encoded.
Which is NOT a property of electromagnetic waves?
They lose energy as they move through mediums.
They can be varied to hold information.
They transfer energy but not matter.
They consist of a series of pulses.
A square wave with values 0 and 1 is an example of a(n) ____________signal.
binary
decoded
analog
digital
Which is false about fiber optic cables?
They rely on total internal reflection to transmit signals.
The glass fiber is highly absorbent.
They can send signals a long distance without the signals degrading.
The cladding causes the light to reflect.
Which of the following is a benefit of using digital signals over analog signals?
They require more energy to transmit.
They are less affected by noise.
They are always continuous.
They cannot be stored easily.
What is the main function of the cladding in a fiber optic cable?
To absorb light and prevent transmission
To convert digital signals to analog
To reflect light back into the core
To generate electrical signals
Which statement is true about electromagnetic waves?
They require a medium to travel through.
They can travel through a vacuum.
They transfer matter from one place to another.
They cannot be used for communication.
Which of the following is NOT an example of an electromagnetic wave?
Radio waves
Sound waves
Light waves
Microwaves
What is a key advantage of using binary numbers in digital communication?
They are less reliable than analog signals
They can be easily affected by noise
They allow for simple and accurate signal processing
They require complex encoding methods
Which part of an optical fiber guides the light along its length?
Sheath
Jacket
Core
Cladding
What happens to a digital signal as it travels a long distance through a medium?
It changes into an analog signal
It cannot be transmitted at all
It may become distorted by noise but can often be restored
It always increases in strength
Which component in a digital communication system is responsible for converting information into a signal?
Cladding
Receiver
Core
Transmitter
