Permanent and Temporary Magnets
المؤلف:
GEORGE A. HOADLEY
المصدر:
ESSENTIALS OF PHYSICS
الجزء والصفحة:
p-300
2025-11-26
42
Demonstration. -Repeat the above demonstration, using a bar of soft iron instead of the steel needle. Does the bar become a magnet? Now hold one end of a soft iron bar on or near the end of a magnet, and bring the other end of the bar near some iron filings. What is the result?
Pieces of soft iron can be made to act as temporary magnets while near another magnet, but they retain hardly any magnetism after the other magnet is removed. Pieces of steel retain their magnetism to a great degree and hence can be made into permanent magnets.
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