Analogue & Digital Signals

What are the two different ways of sending information?

• Analog and digital signals

• Morse code and smoke signals

• Email and postal mail

• Radio and television

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How does a digital signal differ from an analog signal?

• It varies continuously in amplitude and frequency

• It can take many different values

• It can only take two values: 1 or 0

• It is sent via copper wires

Why is digital a better way of sending information over long distances?

• It uses copper wires

• It is faster than analog signals

• It requires less energy

• It is unaffected by noise or interference

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What happens to an analog signal as it travels?

• It picks up noise and its amplitude is reduced

• It remains unchanged

• It becomes faster

• It converts into a digital signal

What is a major benefit of digital signals over analog signals?

• They are easier to store

• They can carry much more information

• They are cheaper to produce

• They use less bandwidth

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NGSS.HS-PS4-2

Which component is essential for converting an analog signal to a digital signal?

• Analog-to-Digital Converter (ADC)

• Digital-to-Analog Converter (DAC)

• Amplifier

• Filter

Why do digital signals require error checking and correction mechanisms?

• To ensure the signal travels faster

• To convert them back to analog signals

• To maintain signal strength over long distances

• To prevent data corruption due to noise and interference

Tags

NGSS.HS-PS4-2

NGSS.HS-PS4-5

What characteristic of a digital signal allows it to be easily compressed and transmitted?

• Its continuous nature

• Its discrete values

• Its high frequency

• Its amplitude variations

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