Virtual Labs

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Aim

Theory

Pretest

Procedure

Simulation

Posttest

References

Contributors

Feedback

To interface an Ultrasonic sensor with Raspberry Pi

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Beginner

Intermediate

Advanced

Which type of waves does the HC-SR04 Ultrasonic Sensor emit for distance measurement?

a: Infrared waves Explanation

Explanation

b: Ultrasonic sound waves Explanation

Explanation

c: Microwaves Explanation

Explanation

d: Radio waves Explanation

Explanation

What is the typical operating voltage for the HC-SR04 Ultrasonic Sensor?

a: 12V DC Explanation

Explanation

b: 9V DC Explanation

Explanation

c: 5V DC Explanation

Explanation

d: 3.3V DC Explanation

Explanation

Why is a voltage divider often used when connecting the Echo pin to a Raspberry Pi?

a: To increase signal speed Explanation

Explanation

b: To protect the Pi from 5V logic levels Explanation

Explanation

c: To reduce noise in the signal Explanation

Explanation

d: To improve accuracy of measurements Explanation

Explanation

In this experiment, the distance is calculated based on:

a: The amplitude of the reflected ultrasonic wave Explanation

Explanation

b: The phase shift between sent and received signals Explanation

Explanation

c: The time taken for the ultrasonic pulse to travel to the object and back Explanation

Explanation

d: The frequency change of the reflected wave Explanation

Explanation

What is the typical measurement range of the HC-SR04 Ultrasonic Sensor?

a: 2 cm to 400 cm Explanation

Explanation

b: 10 cm to 10 m Explanation

Explanation

c: 1 mm to 50 cm Explanation

Explanation

d: 5 cm to 200 cm Explanation

Explanation

Which Raspberry Pi library is commonly used in Python to control GPIO pins for this experiment?

a: RPi.GPIO Explanation

Explanation

b: NumPy Explanation

Explanation

c: OpenCV Explanation

Explanation

d: Matplotlib Explanation

Explanation

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