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第 28 章

磁力と磁場

磁気
磁気
Magnets are commonly found in everyday objects, such as toys, hangers, elevators, doorbells, and computer devices. Experimentation on these magnets shows ...
磁場
磁場
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 ...
磁力線
磁力線
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 ...
磁束
磁束
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). ...
磁場中での荷電粒子の運動
磁場中での荷電粒子の運動
A charged particle experiences a force when moving through a magnetic field. Consider the field to be uniform and the charged particle to move ...
磁力
磁力
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 ...
通電導体にかかる磁力
通電導体にかかる磁力
Moving charges experience a force in a magnetic field. Since the magnetic fields produced by moving charges are proportional to the current, a conductor ...
通電ワイヤの磁力:例
通電ワイヤの磁力:例
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 ...
磁場中の電流ループに力がかかる
磁場中の電流ループに力がかかる
Magnetic forces on wires carrying current are most frequently applied in motors. A DC motor is a device that converts electrical energy into mechanical ...
磁場中の電流ループのトルク
磁場中の電流ループのトルク
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 ...
ホール効果
ホール効果
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 ...
トムソンのe/m実験
トムソンのe/m実験
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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