WAEC Physics 2024 Objective — Question 44
Question 44 of 50 from the West African Examinations Council (WAEC) Physics 2024 Objective paper, with the correct answer and a full explanation.
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44. In storing magnets, the keepers are used to A.
- A. cancel the effect of the earth's magnetism.
- B. reduce self-demagnetization.Correct
- C. protect the magnet from stay electric field.
- D. increase the strength of the magnet.
Explanation
Keepers reduce self-demagnetization of magnets by providing a low reluctance path for magnetic flux, thereby containing the flux within the keeper. This minimizes external magnetic field interference, prevents pole reversal, and offers mechanical protection, ultimately preserving the magnet's strength and stability.
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