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Question 10

Four identical iron bars were dipped in a heap of iron filings one by one. Fig. shows the amount of iron filings sticking to each of them.

(a) Which of the iron bar is likely to be the strongest magnet?
(b) Which of the iron bars is not a magnet? Justify your answer.


Solution

When iron bars are dipped in the heap of iron filing, depending on the magnetic property of the bar, it attracts the iron filings towards it.

(a) Iron bar (a) seems to be the strongest magnet because maximum iron filings have been attracted by it.
(b) Iron bar (b) is not a magnet because no iron filings have been attracted by it.

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