9) Characteristics of four different permanent magnet materials are shown in the

Question

9) Characteristics of four different permanent magnet materials are shown in the below figure Everything else being similar, what magnet material can better resist against demagnetization? a) Alnico S 15 b) Ceramic 7 10 09 ()? c) Samarium cobalt Neodymium iron boron d) Neodymium-iron-boron 0.4 0.a 0 Samarium cobalt Ccramic 7 000 900 -800-700 0o -500 -400 300 200 -100 H. kA/m 10) F or the characteristics of the previous question, what magnet material could create the largest magnetic field? a) Alnico 5 b) Ceramic 7 c) Samarium cobalt d) Neodymium-iron-boron 11) In a DC machine, the current polarity of the conductor that undergoes commutation rapidly, resulting in large di/dt. This phenomenon is called a) Shift of neutral plane b) Flux weakening c) Inductive kick d) Run-out

Explanation / Answer

9. d) Neodymium iron boron because it has the highest coercivity(from graph).

10. d) Neodymium iron boron because it has highest remanence.

11. c)Inductive kick

Related Questions

Navigate

• Browse (All)
• Browse 9
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.