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範例:運動電荷在均勻磁場中的圓周運動[87日大]

將兩個相同的帶電粒子以相同的初速,分別射入兩均勻磁場中,作圓周運動。設甲粒子進入之磁場量值為B,乙粒子進入之磁場量值為2B,則下列敘述何者正確? (A)乙粒子所受磁力的量值為甲粒子所受磁力量值的兩倍。(B)乙粒子的動能為甲粒子動能的兩倍。(C)乙粒子的迴旋頻率為甲粒子迴旋頻率的2倍。(D)乙粒子的軌道半徑為甲粒子軌道半徑的兩倍。(E)乙粒子對其軌道中心的角動量量值為甲粒子對其軌道中心的角動量量值的兩倍。[87日大]


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Posted in 歷屆物理考題, 運動電荷在磁場中的運動.

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