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Chapter 28

Magnetic Forces and Fields

مغناطيسية
مغناطيسية
Magnets are commonly found in everyday objects, such as toys, hangers, elevators, doorbells, and computer devices. Experimentation on these magnets shows ...
المجالات المغناطيسية
المجالات المغناطيسية
A moving charge or a current creates a magnetic field in the surrounding space, in addition to its electric field. The magnetic field exerts a force on ...
خطوط المجال المغناطيسي
خطوط المجال المغناطيسي
The representation of magnetic fields by magnetic field lines is very useful in visualizing the strength and direction of the magnetic field. Each of the ...
التدفق المغناطيسي
التدفق المغناطيسي
The magnetic flux measures the number of magnetic field lines passing through a given surface area. The SI unit for magnetic flux is the weber (Wb). ...
حركة جسيم مشحون في مجال مغناطيسي
حركة جسيم مشحون في مجال مغناطيسي
A charged particle experiences a force when moving through a magnetic field. Consider the field to be uniform and the charged particle to move ...
القوة المغناطيسية
القوة المغناطيسية
In addition to the electric forces between electric charges, moving electric charges exert magnetic forces on each other. A magnetic field is created by a ...
القوة المغناطيسية على موصل يحمل التيار
القوة المغناطيسية على موصل يحمل التيار
Moving charges experience a force in a magnetic field. Since the magnetic fields produced by moving charges are proportional to the current, a conductor ...
القوة المغناطيسية على الأسلاك الحاملة للتيار: مثال
القوة المغناطيسية على الأسلاك الحاملة للتيار: مثال
In a magnetic field, moving charges encounter a force. If a wire contains these moving charges, i.e., if the wire is carrying a current, then a force acts ...
القوة على حلقة التيار في المجال المغناطيسي
القوة على حلقة التيار في المجال المغناطيسي
Magnetic forces on wires carrying current are most frequently applied in motors. A DC motor is a device that converts electrical energy into mechanical ...
عزم الدوران على حلقة التيار في المجال المغناطيسي
عزم الدوران على حلقة التيار في المجال المغناطيسي
The most common application of magnetic force on current-carrying wires is in electric motors. These consist of loops of wire, which are placed between ...
تأثير القاعة
تأثير القاعة
Edwin H. Hall, in the year 1879, devised an experiment that could be used to identify the polarity of the predominant charge carriers in a conducting ...
تجربة طومسون e / m
تجربة طومسون e / m
In a beam of charged particles created by a heated cathode, the particles move at different speeds. However, many applications need a beam with uniform ...
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