Engineering Physics: Waves and Ultrasonic Waves Quiz

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Questions and Answers

What is the principle on which ultrasonic transducers can operate?

Electromagnetic effect
Photoelectric effect
Piezoelectric effect or magnetostrictive effect (correct)
Thermoelectric effect

What is the frequency range for producing high intensity ultrasonic sound for ultrasonic cleaning?

100-200 kHz
50-100 kHz
1-10 kHz
20-40 kHz (correct)

What is the primary function of an ultrasonic transducer?

Convert heat energy to mechanical energy
Convert light energy to electrical energy
Convert electrical energy to mechanical energy and vice versa (correct)
Convert mechanical energy to electrical energy

What is the main purpose of a transducer?

<p>Convert energy from one form to another (A)</p> Signup and view all the answers

What are the applications of ultrasonic waves?

<p>Detection of flaws in materials, medical imaging, and cleaning (B)</p> Signup and view all the answers

Flashcards

Ultrasonic Transducer Principle

Ultrasonic transducers work using either the piezoelectric effect or the magnetostrictive effect. The piezoelectric effect converts electrical energy into mechanical vibrations and vice versa due to the material's deformation under an electric field. Magnetostrictive materials change shape when exposed to a magnetic field.

Frequency Range for Cleaning

Ultrasonic cleaning typically uses frequencies between 20 and 40 kHz to generate high-intensity sound waves. These waves create cavitation bubbles that effectively remove dirt and contaminants from surfaces.

Transducer's Main Function

A transducer is designed to convert energy from one form to another. In the case of ultrasonic transducers, they convert electrical energy into mechanical energy (sound waves) and vice versa.

Ultrasonic Wave Applications

Ultrasonic waves have diverse applications including: detecting flaws in materials, creating images in medicine, and cleaning objects.

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Ultrasonic Cleaning Mechanism

High-intensity sound waves create cavitation bubbles in a cleaning solution. These bubbles implode, generating micro-jets that effectively remove dirt and contaminants from surfaces.

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