Hardware ( Sensors)

What is a sensor?

• A device that stores data

• A device that detects physical changes in the environment

• A device that processes information

• A device that outputs signals

What is the purpose of a temperature sensor?

• To measure the distance between objects

• To detect motion

• To measure temperature changes

• To measure pressure

Which of the following is an example of a motion sensor?

• Thermistor

• DR (Light Dependent Resistor)

• PIR (Passive Infrared) sensor

• Barometer

What type of sensor is commonly used in a digital thermometer?

• Pressure sensor

• Temperature sensor (e.g., thermistor)

• Proximity sensor

• Light sensor

How does a light sensor work?

• It detects the amount of heat in the environment.

• It converts light energy into an electrical signal.

• It measures the pressure exerted on a surface.

• It detects the motion of an object.

Which sensor would be used to measure atmospheric pressure?

• LDR

• Barometer

• Thermocouple

• Ultrasonic sensor

What is the key difference between analog and digital sensors?

• Analog sensors give continuous values, while digital sensors give discrete values.

• Analog sensors are cheaper than digital sensors.

• Digital sensors give continuous values, while analog sensors give discrete values.

• Digital sensors require more power than analog sensors.

Which type of sensor would most likely be used in an automatic lighting system?

• Motion sensor

• Light sensor

• Pressure sensor

• Gas sensor

Where would a gas sensor typically be used?

• In a car's engine

• In a food preservation system

• In a home security system

• In a weather monitoring system

What does a humidity sensor measure?

• Air pressure

• The amount of moisture in the air

• The intensity of light

• The temperature of a surface