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Chapter 28

Magnetic Forces and Fields

Магнетизм
Магнетизм
Magnets are commonly found in everyday objects, such as toys, hangers, elevators, doorbells, and computer devices. Experimentation on these magnets shows ...
Магнитные поля
Магнитные поля
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 ...
Магнитные силовые линии
Магнитные силовые линии
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 ...
Магнитный поток
Магнитный поток
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). ...
Движение заряженной частицы в магнитном поле
Движение заряженной частицы в магнитном поле
A charged particle experiences a force when moving through a magnetic field. Consider the field to be uniform and the charged particle to move ...
Магнитная сила
Магнитная сила
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 ...
Магнитная сила на токопроводящий проводник
Магнитная сила на токопроводящий проводник
Moving charges experience a force in a magnetic field. Since the magnetic fields produced by moving charges are proportional to the current, a conductor ...
Магнитная сила на токоведущих проводах: пример
Магнитная сила на токоведущих проводах: пример
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 ...
Сила на токовую петлю в магнитном поле
Сила на токовую петлю в магнитном поле
Magnetic forces on wires carrying current are most frequently applied in motors. A DC motor is a device that converts electrical energy into mechanical ...
Крутящий момент на токовой петле в магнитном поле
Крутящий момент на токовой петле в магнитном поле
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 ...
Эффект Холла
Эффект Холла
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 ...
Эксперимент Томсона e/m
Эксперимент Томсона 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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