Ultrasonic Sensor Quiz

What does the ultrasonic sensor measure?

• Temperature

• Distance

• Light intensity

• Speed

Which two pins are essential to operate the ultrasonic sensor?

• VCC and GND

• Trigger and Echo

• RX and TX

• SDA and SCL

The speed of sound in air is approximately:

• 340 m/s

• 1500 m/s

• 100 m/s

• 500 m/s

If the ultrasonic sensor detects an object at 5 cm, what does it mean?

• The object is too far

• The object is at a distance of 5 cm from the sensor

• The sensor is not working

• The relay is turned on

Which Arduino function is used to measure the pulse time from the echo pin?

• digitalRead()

• pulseIn()

• analogRead()

• millis()

What is the typical frequency range of ultrasonic sensors?

• 1 kHz to 10 kHz

• 20 kHz to 40 kHz

• 20 Hz to 20 kHz

• 100 Hz to 1 kHz

Which component is commonly used to convert the ultrasonic signal into an electrical signal?

• Transducer

• Amplifier

• Microphone

• Speaker