Question

what are the disadvantages of magnetic field lines? explain.​

Answer 1

Answer:

$\huge\red{DISADVANTAGE}$

1. Disadvantages of the Magnetic Particle method of Non-Destructive Examination are:
3. It is restricted to ferromagnetic materials - usually iron and steel, and cannot be used on austenitic stainless steel
4. It is messy
5. Most methods need a supply of electricity

It is sometimes unclear whether the magnetic field is sufficiently strong to give good indications

The method cannot be used if a thick paint coating is present