Which of the following properties are desired in materials for permanent magnets?
(A) High retentivity
(B) High coercivity
(C) High permeability
(D) low permeability
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → (A), (B) and (C) only
For permanent magnets:
(A) High retentivity → to retain strong magnetization.
(B) High coercivity → to resist demagnetization.
(C) High permeability → to allow easy magnetization during preparation.
∴ Correct options: (A), (B), and (C)