Which of the following statements about magnetostriction and its ill effects is INCORRECT?
1
The transformer buzzing noise is caused by a phenomenon of magnetostriction.
2
The applied magnetic field changes the magnetostrictive strain until reaching its saturation value.
3
This effect causes losses which produce heat in ferromagnetic cores.
4
Using a low value of flux density core is one of the reasons for humming sound in a transformer.
5
Question Not Attempted