Four identical iron bars were dipped in a heap of iron filings one by one. The figure shows the amount of iron filings sticking to each of them. Which of the iron bars is not a magnet? Justify your answer.

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Solution

Iron bar ( $b$ ) is not a magnet as it does not have any iron fillings attracted to it.

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Four identical iron bars were dipped in a heap of iron filings one by one. The figure shows the amount of iron filings sticking to each of them. Which of the iron bars is not a magnet? Justify your answer.

Iron bar (b) is not a magnet as it does not have any iron fillings attracted to it.

Iron bar ( $b$ ) is not a magnet as it does not have any iron fillings attracted to it.