IoT Sensors and Devices

___ is an input device that provides an output (signal) with respect to a specific physical quantity (input).

• transmitter

• signal

• sensor

• IoT

Which of these do not require any external power signal and directly generates output response?

• Sensors

• Passive Sensors

• Active Sensors

• Microcontroller

What type of sensor is shown in the figure?

• Passive sensor

• Active sensor

Guess the type of sensor from the figure shown.

• PIR sensor

• ultrasonic sensor

• rainfall sensor

• smoke detector

Which of these is a touch sensor?

• 
• 
• 
• None of these

Which of these is a non-contact type of sensor?

• Ultrasonic sensor

• PIR sensor

• Touch Sensor

• both A and B

What is the output voltage when the smoke is detected through the MQ-2 sensor?

• High

• Low

What happens to the resistance value when the soil moisture sensor detects the high amount of moisture in the soil?

Draw an LDR sensor

Which of these is an application of microcontroller?

• Calculators

• Accounting system

• Washing machine

• Games machine