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प्रश्न
Four identical iron bars were dipped in a heap of iron filings one by one. Fig. 13.5 shows the amount of iron filings sticking to each of them.
Which of the iron bars is not a magnet? Justify your answer.
उत्तर
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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