WorksheetsUltrasonic Sensor Quiz
Total questions: 15
Worksheet time: 15mins
Which pins of the ultrasonic sensor are used for sending and receiving sound?
VCC and GND
Trigger and Echo
Trigger and VCC
Echo and GND
Which two parts are mainly used in the ultrasonic sensor to detect distance?
Light and sound
Sound transmitter and sound receiver
Heat sensor and fan
Battery and motor
What does the ultrasonic sensor measure?
Speed
Distance
Temperature
Weight
Which of the following best describes how an ultrasonic sensor works?
It uses light to measure distance.
It uses sound waves to find how far an object is.
It uses magnets to pull objects.
It uses heat to find temperature.
If the ultrasonic sensor shows a distance of 50 cm, what does it mean?
The object is 50 cm away from the sensor.
The object is moving.
The object is 100 cm away.
The object is touching the sensor.
Which pins on the ultrasonic sensor are called Trigger and Echo?
Power pins
Signal pins
Ground pins
Motor pins
Which pin on the ultrasonic sensor sends out the sound pulse?
Echo
GND
Trigger
VCC
What is the formula to find Distance?
Distance = Speed + Time
Distance = Speed ÷ Time
Distance = Speed × Time
Distance = Speed - Time
A car moves at a speed of 2 meters per second. How far will it travel in 3 seconds?
5 meters
6 meters
7 meters
3 meters
Why do we divide by 2 when calculating distance using an ultrasonic sensor?
Sound travels two times (to the object and back)
Sound slows down in air
To match Micro:bit clock speed
To double the reading
If the sensor and the object are not properly aligned, what problem can occur?
Wrong distance measured
No reading received
Multiple signals received
All of the above
Which two pins must be connected to power up the ultrasonic sensor?
Trigger and Echo
VCC and GND
Trigger and VCC
Echo and GND
A toy car moves 5 meters in 2 seconds. What is its speed?
2.5 meters per second
3 meters per second
5 meters per second
10 meters per second
What is the job of the Trigger pin?
Receive sound
Send out sound pulse
Power the Micro:bit
Connect to battery
Which animal uses echolocation similar to how ultrasonic sensors work?
Lion
Dog
Bat
Elephant
