The force exerted by a magnetic field on a charged particle when it moves through it. When a particle of charge q moves at speed v through a magnetic field with magnetic flux density B , the Lorentz force is expressed as q ( v × B ) and is perpendicular to both the magnetic flux density and the velocity. As a result, the particle bends in a direction perpendicular to the magnetic field, but does not receive work. When a particle moves through an electromagnetic field, qE + q ( v × B ) is sometimes called the Lorentz force, including the force due to the electric field E , and is often used as a basic formula to discuss the movement of charged particles in electromagnetic fields. Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information |
荷電粒子が磁場中を運動するとき磁場により受ける力。電荷 q の粒子が磁束密度 B の磁場中を速度 v で動くとき,ローレンツ力は q(v×B) で表され,磁束密度と速度の両方に垂直である。このため粒子は磁場に垂直な方向に曲るが,仕事は受けない。粒子が電磁場中を運動するとき,電場 E による力をも含めて qE+q(v×B) をローレンツ力ということもあり,これは電磁場中の荷電粒子の運動を論じる基礎式としてよく用いられる。
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