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Question
Four identical iron bars were dipped in a heap of iron filings one by one. Figure shows the amount of iron filings sticking to each of them.
- Which of the iron bar is likely to be the strongest magnet?
- Which of the iron bars is not a magnet? Justify your answer.
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Solution
- Among the four given magnets, the iron bar marked with (a) is the strongest magnet since many filings are attached to it.
- The iron bar that has no filings attached to it is not a magnet. Such a piece is an iron bar (b).
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