The magnetic material produced from the chemical combination of metal oxides and has a very...
PHYSICS
WAEC 2022
The magnetic material produced from the chemical combination of metal oxides and has a very high resistance to electric current is called
- A. ferrite substance
- B. paramagnetic substance
- C. ferromagnetic substance
- D. diamagnetic substance
Correct Answer: A. ferrite substance
Explanation
Ferrite magnets are non-conductive aferromagnetic ceramic compounds derived from iron oxides such as Haematite (Fe203) or Magnetite (Fe304) and other metal oxides such as Barium and Strontium. Ferrite is a polycrystal, sintered material with high electrical resistivity. The high resistance of ferrite makes eddy current losses extremely low at high frequencies.
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