9) Characteristics of four different permanent magnet materials are shown in the
ID: 1751139 • Letter: 9
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 c) Samarium cobalt Neodymium iron boron 06 d) Neodymium-iron-boron 0.4 0.a 0. Samarium cobalt Ceramic 7 000 900 -800-700 600 -500 -400 00 200 -100u H, kA/m 10) For 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 t polarity of the conductor that undergoes commutation reverses rapidly, resulting in large di/dt. This phenomenon is called a) Shift of neutral plane b) Flux weakening c) Inductive kick d) Run-outExplanation / Answer
9) D) Neodymium-iron-bor0n
10) D) Neodymium-iron-boron that could create largest magnetic filed.
11) C) Inductive kick
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