Which sensor is used in fitness trackers to measure heart rate?

What is the full form of CMOS?

How does a magnetic stripe reader read data from a magnetic stripe?

What is the purpose of an RFID reader?

Which of the following is an example of an active RFID tag?

What does RFID stand for?

What is a pin pad used for?

What is the purpose of a number pad?

Which of the following is a type of magnetic sensor?

What types of documents can be scanned?

What is the difference between analog and digital signals?

What is the purpose of a motion sensor in security systems?

Which of the following is NOT a potential use of voice recognition systems?

What is the primary purpose of an IR sensor?

What is the typical operating range of IR sensors?