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Gaokao Physics Practice Question

带电粒子 $\mathrm{a} $、$ \mathrm{~b}$ 在同一匀强磁场中做匀速圆周运动, 它们的动量大小 相等, $\mathrm{a}$ 运动的半径大于 $\mathrm{b}$ 运动的半径. 若 $\mathrm{a} $、$ \mathrm{~b}$ 的电荷量分别为 $\mathrm{q}_a $、$\mathrm{q}_\mathrm{b}$, 质 量分别为 $m_{a} $、$ m_{b}$, 周期分别为 $T_{a} $、$ T_{b}$. 则一定有

  1. A.$\mathrm{q}_{\mathrm{a}}<\mathrm{qb}_{\mathrm{b}}$
  2. B.$\mathrm{m}_{\mathrm{a}}<\mathrm{m}_{\mathrm{b}}$
  3. C.$\mathrm{T}_{\mathrm{a}}<\mathrm{T}_{\mathrm{b}}$
  4. D.$\frac{\mathrm{q}_{\mathrm{a}}}{\mathrm{m}_{\mathrm{a}}}<\frac{\mathrm{q}_{\mathrm{b}}}{\mathrm{m}_{\mathrm{b}}}$

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