JAMB Physics 2022 Objective — Question 7
Question 7 of 41 from the Joint Admissions and Matriculation Board (JAMB) Physics 2022 Objective paper, with the correct answer and a full explanation.
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Best method of demagnetizing a steel bar magnet:
- A. solenoid methodCorrect
- B. hammering
- C. heating
- D. rough handling
Explanation
AC solenoid (electrical method) is most effective and complete.
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