Answer :
Final answer:
Music on CDs and digital clocks are examples of digital signals, while speedometers and analog clocks are examples of analog signals. Motion pictures on film are also analog. Recognizing these distinctions is important for understanding signal types.
Explanation:
Understanding Analog and Digital Signals
In the realm of technology and communication, distinguishing between analog and digital signals is crucial. Here’s a classification of the signals mentioned:
- a. Music recorded on a compact disc: Digital - Compact discs store music in a digital format, which represents sound as binary data (0s and 1s).
- b. Speed displayed by the needle on a speedometer dial: Analog - This signal is continuous and represented by the position of the needle on a dial, indicating varying speeds.
- c. Time displayed on a clock with three or four numerals: Digital - Such clocks display time in a discrete format with numbers, often in hours and minutes.
- d. Time displayed on a clock with hands and a circular dial: Analog - This format shows time through the continuous movement of hands around a dial.
- e. A motion picture on film: Analog - Film presents a continuous series of images, projecting them sequentially to create motion.
Conclusion: In summary, items a, c, and e are considered digital signals, while items b and d are analog signals. Understanding these differences is essential in fields like telecommunications and media.
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