Virtual Labs

Determination of ultrasonic waves velocity in liquid media

Which of the following statements is true about the interference of ultrasonic waves?

a: Interference only occurs in a medium with high density. Explanation

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b: Interference only occurs at a specific frequency. Explanation

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c: Interference occurs regardless of the frequency. Explanation

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d: Interference occurs only when the ultrasonic waves are in-phase. Explanation

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What is the purpose of knobs marked 'Adj' and 'Gain'

a: The needle on the Ammeter is adjusted by 'Adj' and the sensitivity of the instrument for greater deflection is set by 'Gain'. Explanation

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b: To increase or decrease the frequency of ultrasonic waves generated. Explanation

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c: To change the medium Explanation

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d: The needle on the Ammeter is adjusted by ‘Gain’ and the sensitivity of the instrument for greater deflection is set by 'Adj'. Explanation

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What is the purpose of the water column in an ultrasonic interferometer?

a: To absorb ultrasonic waves Explanation

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b: To reflect ultrasonic waves Explanation

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c: To alter the frequency of ultrasonic waves Explanation

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d: To create interference patterns Explanation

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In an ultrasonic interferometer experiment, if the water level is adjusted to produce maximum interference, what does it indicate about the path difference of the ultrasonic waves?

a: The path difference is zero. Explanation

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b: The path difference is half a wavelength. Explanation

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c: The path difference is a full wavelength. Explanation

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d: The path difference is variable. Explanation

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What is the advantage of using an ultrasonic interferometer over other methods for measuring the speed of sound?

a: It is more accurate and consistent Explanation

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b: It is less expensive. Explanation

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c: It is faster. Explanation

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d: It is easier to set up. Explanation

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