A 1 mm thick iron sheet is placed on top of a bar magnet Iron filings are placed on the iron sheet jus above the bar magnet The

Question

A 1 mm thick iron sheet is placed on top of a bar magnet Iron filings are placed on the iron sheet jus above the bar magnet The set up is turned upside down while holding the sheet firmly The magnet now on top and the sheet below it The procedure is repeated using a glass and a cardboard sheet the same thickness as the iron sheet On which of the upturned sheets are iron filings likely to be seen sticking B C only on the iron sheet only on the cardboard sheet only on the glass and cardboard sheets on all three sheets iron glass and cardboard

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