Magnetic and Nonmagnetic Substances
المؤلف:
GEORGE A. HOADLEY
المصدر:
ESSENTIALS OF PHYSICS
الجزء والصفحة:
p-301
2025-11-26
40
Demonstration. - Place on a table a collection of a dozen different materials, nails, screws, pins, coins, pencils, wire, paper, etc.,and try to pick them up with a magnet. Part of them will be picked up, but upon others the magnet will have no effect whatever.
Those substances that are attracted by a magnet are called magnetic substances, while those that are not attracted by it are called nonmagnetic substances. Iron and steel are magnetic; also, to a less degree, nickel and cobalt. Some ores of iron are magnetic, while others are not. Nonmagnetic iron ores can be made magnetic by being strongly heated, as in the flame of a blowpipe.
الاكثر قراءة في المغناطيسية
اخر الاخبار
اخبار العتبة العباسية المقدسة
