JAMB Physics 2023 Objective — Question 13
Question 13 of 40 from the Joint Admissions and Matriculation Board (JAMB) Physics 2023 Objective paper, with the correct answer and a full explanation.
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What is the best method of demagnetizing a steel bar magnet?
- A. Hammering
- B. Heating
- C. electrical methodCorrect
- D. none
Explanation
The electrical (solenoid AC) method is most effective for demagnetisation.
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