Question

Which of the following is true about metallic glasses?

(a) Low electrical resistance

(b) Hexagonal closely packed structure

(c) Non-malleable

(d) Low core loss

This question was posed to me during an online interview.

Origin of the question is Metallic Glasses topic in portion Advanced Engineering Materials of Engineering Physics II

Answer 1

Right choice is (d) Low core loss

For explanation: Metallic glasses can be magnetised and demagnetised easily. They have a very narrow hysteresis loop. They therefore exhibit very low hysteresis loss and hence transformer core loss is very less. They have high electrical resistance and Tetrahedral closely packed structure.