PS4.C - Informational Technologies - Level 4*

Front

What is the main advantage of digital cell phone signals over analog signals?

Back

Digital cell phone signals are more reliable due to features like noise resistance, error correction, and signal regeneration.

Front

What does the term 'frequency' refer to in wave physics?

Back

Frequency measures the number of cycles a wave completes in one second, typically expressed in Hertz (Hz).

Front

How do cell phones enhance daily activities?

Back

Cell phones are essential for communication, photography, and accessing information, impacting various aspects of daily life.

Front

What is the significance of digitized signals in communication?

Back

Digitized signals provide a more reliable way to encode and transmit information, reducing degradation over distances.

Front

Which device does NOT use energy waves for communication?

Back

Acoustic guitars do not use energy waves; they produce sound through vibrations.

Front

What is noise resistance in digital signals?

Back

Noise resistance refers to the ability of digital signals to maintain clarity and integrity despite interference.

Front

What is error correction in digital communication?

Back

Error correction is a technique used to detect and correct errors in transmitted data, ensuring accurate communication.

Front

What is signal regeneration?

Back

Signal regeneration is the process of amplifying and restoring a signal to its original quality to prevent degradation over long distances.

Front

What is the difference between analog and digital signals?

Back

Analog signals are continuous and can vary in amplitude and frequency, while digital signals are discrete and represent data in binary form.

Front

How do Wi-Fi routers use energy waves?

Back

Wi-Fi routers transmit data using radio waves, allowing wireless communication between devices.