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...heating effect of electric current....
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When current flows through a conductor, heat energy is generated in the conductor. The heating effect of an electric current depends on three factors: The resistance, R of the conductor. A higher resistance produces more heat.
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Ultrasound is the sound waves of high frequencies which are used in many fields such as construction, medical field, manufacturing weapons, communication etc.
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Ultrasonic sounds are sound waves of high frequency i.e. higher than 20 KHz. It does not have different properties. It has the same properties of normal sound but has a high frequency. These high frequency sounds are used for measuring distance, cleaning, sonography etc.
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