The a.c magnetizes the magnet alternately in the opposite directions 50 times in one second. When withdrawn slowly, different parts attain random polarities.
Wilfykil answered the question on March 25, 2019 at 05:49
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Date posted: March 23, 2019. Answers (1)
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Date posted: March 23, 2019. Answers (1)
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Date posted: March 23, 2019. Answers (1)
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Date posted: March 23, 2019. Answers (1)