Which is the best procedure to make a permanent magnet?
placing a magnetically hard material in a weak magnetic field
O placing a magnetically hard material in a strong magnetic field
placing a magnetically soft material in a weak magnetic field
placing a magnetically soft material in a strong magnetic field
placing a magnetically hard material in a weak magnetic field
O placing a magnetically hard material in a strong magnetic field
placing a magnetically soft material in a weak magnetic field
placing a magnetically soft material in a strong magnetic field