alleryWhich of these permanent magnets is among the strongest?
AFlexible rubber magnet
BCeramic ferrite magnet
CNeodymium–iron–boron
DInjection-molded magnet
Answer & Solution
Correct answer: C. Neodymium–iron–boron
1. Flexible and ceramic magnets are cheap but weak.
2. Injection-molded magnets are weaker than metal ones.
3. Neodymium–iron–boron magnets are among the strongest.
_Source: Wikipedia, Magnet, Costs_
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