Production of ultrasonic waves by magnetostriction method

Magnetostriction:

When magnetic field is applied across the length of a ferromagnetic¬† rod such as Nickel, then change in the length of rod is observed. This is called Magnetostriction. The charge in length is propotional to the strength of megnetic field. ¬†The increase in length is very small in practice. Amongst all ferromagnetic substances, increase in length is maximum for Nickel. Continue reading “Production of ultrasonic waves by magnetostriction method”