Which of the following is used by permanent magnets as the magnetic material?
A. iron
B. nickel
C. soft steel
D. hardened steel
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Answer: D
Share your understanding of this question with the correct explanation.
Which of the following is used by permanent magnets as the magnetic material?
A. iron
B. nickel
C. soft steel
D. hardened steel
Answer: D
Share your understanding of this question with the correct explanation.