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قديم 11-14-2016, 10:11 PM   #4 (permalink)
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 تاريخ التسجيل :  Jun 2013
 أخر زيارة : 11-15-2017 (05:12 PM)
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Magnetism


36- The direction of a magnetic field is defined by the direction a compass needle points.
37- Magnetic fields point from the north to the south outside the magnet and south to north inside the magnet.
38- Magnetic flux is measured in webers.
39- Left hands are for negative charges and right hands are for positive charges.
40- The first hand rule deals with the B-field around a current bearing wire, the third hand rule looks at the force on charges moving in a B-field, and the second hand rule is redundant.
41- Solenoids are stronger with more current or more wire turns or adding a soft iron core.


 

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