Engineering Board Exam Reviewer · Engineering Materials · medium
Materials that are strongly attracted to magnets and can be permanently magnetized, such as iron, nickel and cobalt, are:
- Diamagnetic
- Ferromagnetic
- Paramagnetic
- Antiferromagnetic
Answer
B. Ferromagnetic
Solution
They have large positive susceptibility due to aligned magnetic domains.
More Engineering Materials questions
- Doping silicon with boron produces a/an:
- The electrical conductivity of a pure (intrinsic) semiconductor:
- The band gap of silicon at room temperature is approximately:
- Materials in which the valence band and conduction band overlap, allowing easy electron flow, are:
- Which of the following metals is most noble (least likely to corrode) in the galvanic series in seawater?
- Anodizing is a process used mainly to protect:
- Cracking caused by the combined action of tensile stress and a corrosive environment is called:
- Corrosion that occurs in narrow gaps such as under gaskets or bolt heads is called:
- Localized corrosion that forms small holes or cavities on a metal surface is called:
- In a steel–copper galvanic couple in seawater, which metal corrodes preferentially?