When a ferromagnetic rod of iron or nickel is placed in a magnetic field parallel to its length the rod is thrown into longitudinal vibration thus producing Ultrasonic waves.
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when a ferromagnetic rod is is placed in an alternating magnetic field parallel to its direction the rod experiences a small change in its length.
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A return type describes the type of data which is returned by a call to a method. They keyword void is used to describe a method which does not return any data.
There are two ways. The method can have a try catch block and handle the error/exception inside the method. Or The method can throw the exception under the assumption that the calling method would have the code to handle the exception that is thrown by this method
This is too complicated to describe on this forum, but there are lots of web pages that describe the 'three-ammeter' method of measuring power, so your best plan is to visit one of those sites.
Elementary acoustics, acoustics of building echo and reverberation time absorption of sound, Sabine's formula-- derivation, and drawbacks, cring's equation, measurement of absorption coefficient-by single double source method, acoustics planning of the auditorium. Ultrasonics: magnetostriction and piezoelectric effects, production of ultrasonics by production by magnetostriction and piezoelectric method, properties of ultrasonic waves, cavitations effect, flaw detection ultrasonic emulsification, depth sounding, ultrasonic soldering, ultrasonic drilling. Electricity and Magnetism Concept of potential gradient, equipotential surfaces Lorentz
A rod of ferromagnetic material when placed in a parallel magnetic field, undergoes a small change in length. This phenomenon is called magnetostriction.The change in length depends on the flux density.So if the magnetic field is continuously altered, the rod will expand and contract alternately.This is used in the production of ultrasonic waves.
A common method of attachment utilizes an ultrasonic transducer.
Some demerits of the magnetostriction method include its lower sensitivity compared to other non-destructive testing methods such as eddy current testing, its dependency on the material's magnetic properties, and its limitation in detecting surface defects accurately. Additionally, magnetostriction testing can be influenced by external magnetic fields and may require a skilled operator to interpret the results accurately.
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for my science fair project i had to use scientific method
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Michael T. Kiernan has written: 'A physical model for the acousto-ultrasonic method' -- subject(s): Composite materials, Ultrasonic waves, Industrial applications
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By using Wheat's stone bridge we can detect by thermal method. placing platinum wire in which ultrasonic waves have to be tested, due to change in temperature produced in the wire resistance of the wire changes, it is noted by using galvanometer in the bridge.
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Units of production method.