Computer Sensors

Is the box present?

• Yes

• No

What is the status of the digital sensor?

• A) ON

• B) OFF

Fill in the blank: A sensor is a hardware device that can take analogue measurements of physical properties, such as ________ or ________, from real-world surroundings. These measurements are usually a representation of the actual property being measured.

• temperature; pressure

• color; taste

• brightness; sound

• weight; flavor

How does a sensor read data?

• At a sample rate

• Only when powered off

• By guessing values

• Randomly at any time

What is used to convert the reading from the sensors to digital?

• ADC

• DAC

• Transistor

• Resistor

What does the sensor send to the microprocessor?

• Data

• Electricity

• Sound

• Light

What does the microprocessor compare the sensor data against?

• A stored value

• A random number

• The current time

• A user password

If the value is below or above the stored value, what can the processor do?

• Send a signal to an actuator to take action

• Ignore the value and do nothing

• Store the value for future reference only

• Display an error message on the screen

If the light level measured by the sensor is below the stored value of 10 lumens, what does the microprocessor do?

• Sends a signal to the actuator to turn on the night light

• Increases the brightness of the sensor

• Turns off the microprocessor

• Sends a signal to turn off the night light

Match the following applications to the correct type of sensor:

• pH

• Magnetic Field

• Temperature

• Light

• Gas

• Gas

• Infrared

• Moisture

• Pressure

• Infrared