schoolscienceproject.blogspot.in
Magnetic or
not?
Many iron and
steel objects are magnetised without one realising it. You can detect this
magnetism with a compass. If a rod is magnetised, it must, like the compass
needle, have a north and South Pole. Since two unlike poles attract and two like
poles repel, one pole of the needle will be attracted to the end of the bar and
the other repelled. If the bar is not magnetised, both poles of the needle are
attracted to the end.
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