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
Verified Correct Answer: A.
Physical Principles & Numerical Solution
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.
Source: WAEC / JAMB / NECO Classroom Archive (Record #63301)