A tailor accidentally spills sewing supplies into a bowl of dry sawdust. The mixture contains steel pins,…

A tailor accidentally spills sewing supplies into a bowl of dry sawdust. The mixture contains steel pins, iron needles, copper buttons, and safety pins made of steel. If he sweeps a strong horseshoe magnet over the pile, which item will remain behind in the sawdust?
  1. Steel pins
  2. Iron needles
  3. Copper buttons
  4. Steel safety pins

Solution

Copper is a non-magnetic metal and will not be attracted by the magnet, while iron and steel items are magnetic and will stick to it.

Asked in: Homi Bhabha Practice

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