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WorksheetsInformation Technologies Quiz Lesson 1
Total questions: 10
Worksheet time: 10mins
What is a signal?
A piece of information communicated through the senses
A type of food
A type of transportation
A type of animal
What is needed for a signal to be understood?
The information is encoded and then sent
The information is modulated and varied
The information is stored and transmitted
The information is received and interpreted
How are signals transmitted long distances?
By using vocal cords to speak loudly
By encoding signals in Morse code and binary
Using electromagnetic waves such as radio waves, microwaves, or light waves
By sending signals through physical objects
What is an advantage of using waves to transmit information?
They require physical contact between sender and receiver
They are easily affected by noise
They do not permanently move matter
They lose energy as they travel
What happens to signals as they are transmitted?
They lose energy due to modulation
They can be affected by noise and interference
They become stronger as they travel
They remain crystal clear at all times
How can electromagnetic waves be modulated to contain information?
By changing the wave's amplitude or frequency
By increasing the wave's speed
By reducing the wave's energy
By using physical objects as carriers
What is an advantage of using electromagnetic waves for communication?
They travel very fast
They require physical contact between sender and receiver
They lose energy as they travel
They are easily affected by noise
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.
Light waves stay inside an optical fiber as they are transmitted because the ________.
light waves curve to follow the path of the fiber
fiber is insulated to prevent loss of thermal energy
fiber reflects the light back into the core
fiber is perfectly straight
Electronic signals can travel very long distances in (a) fibers, due to total
internal reflection.
