如图所示,相距为d的两个平行金属板A、B上加的电压为U,A板电势较高.在A板上放一小粒钴60,它不断地向右侧空间放出质量为m、电量为q的α粒子,粒子的最大速率为v,B板上涂有荧光粉,a粒子轰击B
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![如图所示,相距为d的两个平行金属板A、B上加的电压为U,A板电势较高.在A板上放一小粒钴60,它不断地向右侧空间放出质量为m、电量为q的α粒子,粒子的最大速率为v,B板上涂有荧光粉,a粒子轰击B](/uploads/image/z/4934969-17-9.jpg?t=%E5%A6%82%E5%9B%BE%E6%89%80%E7%A4%BA%2C%E7%9B%B8%E8%B7%9D%E4%B8%BAd%E7%9A%84%E4%B8%A4%E4%B8%AA%E5%B9%B3%E8%A1%8C%E9%87%91%E5%B1%9E%E6%9D%BFA%E3%80%81B%E4%B8%8A%E5%8A%A0%E7%9A%84%E7%94%B5%E5%8E%8B%E4%B8%BAU%2CA%E6%9D%BF%E7%94%B5%E5%8A%BF%E8%BE%83%E9%AB%98%EF%BC%8E%E5%9C%A8A%E6%9D%BF%E4%B8%8A%E6%94%BE%E4%B8%80%E5%B0%8F%E7%B2%92%E9%92%B460%2C%E5%AE%83%E4%B8%8D%E6%96%AD%E5%9C%B0%E5%90%91%E5%8F%B3%E4%BE%A7%E7%A9%BA%E9%97%B4%E6%94%BE%E5%87%BA%E8%B4%A8%E9%87%8F%E4%B8%BAm%E3%80%81%E7%94%B5%E9%87%8F%E4%B8%BAq%E7%9A%84%CE%B1%E7%B2%92%E5%AD%90%2C%E7%B2%92%E5%AD%90%E7%9A%84%E6%9C%80%E5%A4%A7%E9%80%9F%E7%8E%87%E4%B8%BAv%2CB%E6%9D%BF%E4%B8%8A%E6%B6%82%E6%9C%89%E8%8D%A7%E5%85%89%E7%B2%89%2Ca%E7%B2%92%E5%AD%90%E8%BD%B0%E5%87%BBB)
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