Fun with Signals and Communication

What is the main purpose of communication systems in engineering?

• To make food taste better

• To send and receive information

• To build tall buildings

• To create new colors

Which of the following is an example of a signal?

• A sandwich

• A phone call

• A chair

• A pencil

What is the name of the process that changes information into a signal for transmission?

• Cooking

• Modulation

• Painting

• Digestion

Which device is commonly used to receive radio signals?

• Refrigerator

• Radio

• Hammer

• Book

What does the term "noise" mean in signal processing?

• Delicious food

• Unwanted changes in a signal

• A type of music

• A bright color

Which of the following is a digital signal?

• A smooth, wavy line

• A series of 1s and 0s

• A rainbow

• A circle

What is the main difference between analog and digital signals?

• Analog signals are only used in computers

• Digital signals use numbers, analog signals are continuous

• Analog signals are always blue

• Digital signals are always loud

Which mathematical function is often used to represent a simple wave signal?

What is the unit used to measure the frequency of a signal?

• Meters

• Seconds

• Hertz (Hz)

• Kilograms

If a signal repeats 5 times every second, what is its frequency?

• 1 Hz

• 5 Hz

• 10 Hz

• 50 Hz