Virtual Labs

Determination of ultrasonic waves velocity in liquid media

What is the working principle of an ultrasonic interferometer?

a: Doppler effect Explanation

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b: Interference of sound waves Explanation

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c: Reflection of sound waves Explanation

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d: Resonance of sound waves Explanation

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Ultrasonic waves

a: Have frequencies higher than 20kHz Explanation

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b: Have high energy Explanation

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c: Are inaudibility to human ear Explanation

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d: All of the options provided Explanation

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When do we note the reading on micrometer scale?

a: When the current in ammeter reaches minima Explanation

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b: When the current in ammeter reaches to a maxima Explanation

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c: When the current in ammeter becomes zero Explanation

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d: None of the options provided Explanation

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The correct flow of steps to complete the experiment is

a: First the cell is filled with the given liquid and the 'adj' and 'gain' of the generator is set at a proper value. 2. The micrometer screw is moved till the anode current reaches to a maximum. 3. The distance‘d’ between two successive maxima and minima is obtained from the readings taken. 4. The wavelength of the ultrasound is calculated using the‘d’ value and hence the velocity of the ultrasonic wave can be calculated using the known frequency. Explanation

Explanation

b: First the micrometer screw is moved till the anode current reaches to a maximum. 2. The cell is filled with the given liquid and the 'adj' and 'gain' of the generator is set at a proper value. 3. The distance‘d’ between two successive maxima and minima is obtained from the readings taken. 4. The wavelength of the ultrasound is calculated using the‘d’ value and hence the velocity of the ultrasonic wave can be calculated using the known frequency. Explanation

Explanation

c: First the micrometer screw is moved till the anode current reaches to a maximum. 2. The cell is filled with the given liquid and the 'adj' and 'gain' of the generator is set at a proper value. 3. The distance‘d’ between two successive maxima and minima is obtained from the readings taken. 4. The frequency of the ultrasound is calculated using the‘d’ value and hence the velocity of the ultrasonic wave can be calculated using the known wavelength. Explanation

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d: None of the options provided Explanation

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Which of the following factors does not affect the speed of sound in an ultrasonic interferometer experiment?

a: Temperature of the medium Explanation

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b: Pressure of the medium Explanation

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c: Frequency of the ultrasonic waves Explanation

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d: Density of the medium Explanation

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