WAEC Physics 2025 Theory — Question 7
Question 7 of 34 from the West African Examinations Council (WAEC) Physics 2025 Theory paper, with the correct answer and a full explanation.
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7(i) Define retentivity of a magnetic material. (ii) State one material with high susceptibility.
Model answer
(i) Retentivity is the ability of a magnetic material to retain its magnetism even after the external magnetic field that magnetized it has been removed. (ii) Materials with high magnetic susceptibility include: Iron, Nickel, Cobalt, Magnetite and Alnico (any one).
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