Question

Which of these statements regarding sensors is TRUE?

• A. Sensors are input devices.
• B. Sensors can be analog as well as digital.
• C. Sensors respond to some external stimuli.
• D. All of these

Answer 1

The correct option is D

All of these

Explanation for the correct options:

1. Analog and Digital Sensors: Analog sensors produce a continuous signal with an analog output over time. In contrast, digital sensors are used when data is converted and transmitted digitally.
2. Option (B): Sensors are thus input devices that can be analog or digital.
3. Option (C): A sensor is a device that detects changes in the environment and responds to the output of another system.
4. A sensor transforms a physical phenomenon into a measurable analog voltage (or, in some cases, a digital signal), which is then displayed or sent for further processing.

Hence, Option (D) is correct.