Quarter 3_Quiz#3 in Technology 10 (Sensors)

Which of the following is/are TRUE about a sensor?

• A device that requires an external power source to respond to environmental input

• A device that generates power with respect to a specific physical quantity

• A device that converts signals from one energy domain to electrical domain

• A device that detects and responds to input from the physical environment

• A device used to indicate by visual sign that transmit over electric call bell circuit.

What is/are the role of sensors in the internet of things (IoT)?

• To act as the eyes and ears for a computing infrastructure

• To detect and respond to input from the external power source

• To create an ecosystem for collecting and processing data about a specific environment

• To convert the environmental input into output analog signals

What are the types of sensors based on the output they produce?

• Electric, biological, chemical, radioactive sensors

• Photoelectric, thermoelectric, electrochemical sensors

• Active and passive sensors

• Analog and digital sensors

What do proximity sensors detect?

• The level of water vapors in the air

• Changes in gravitational acceleration

• Physical movement in a defined space

• The presence of an object or the distance between objects

What do chemical sensors detect?

• A specific chemical substance within a medium

• Changes in gravitational acceleration

• The level of water vapors in the air

• Physical movement in a defined space

What do temperature sensors identify?

• Changes in gravitational acceleration

• The temperature of a target medium

• Physical movement in a defined space

• The level of water vapors in the air

What is the simplest example of a sensor which is a device whose resistance varies according to intensity of light it is subjected to.

• Motion detector

• Accelerometer

• LDR or Light Dependent Resistor

• Chemical sensor

What type of sensor detects physical contact on a monitored surface?

• Touch sensing device

• Proximity sensor

• Pressure sensor

• Motion sensor

What type of sensor converts the environmental input into output analog signals, which are continuous and varying.

• Digital

• Analog

• Active

• Passive

What type of sensor converts the environmental input into discrete digital signals that are transmitted in a binary format (1s and 0s)?

• Passive

• Discrete

• Active

• Digital