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Gaokao Physics Practice Question

质量分别为 $\mathrm{m}_{1}$ 和 $\mathrm{m}_{2}$ 、电荷量分别为 $\mathrm{q}_{1}$ 和 $\mathrm{q}_{2}$ 的两粒子在同一匀强磁 场中做匀速圆周运动, 已知两粒子的动量大小相等. 下列说法正确的是

  1. A.若 $\mathrm{q}_{1}=\mathrm{q}_{2}$, 则它们作圆周运动的半径一定相等
  2. B.若 $m_{1}=m_{2}$, 则它们作圆周运动的半径一定相等
  3. C.若 $\mathrm{q}_{1} \neq \mathrm{q}_{2}$, 则它们作圆周运动的周期一定不相等
  4. D.若 $\mathrm{m}_{1} \neq \mathrm{m}_{2}$, 则它们作圆周运动的周期一定不相等

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