在该盘上与转轴同心地放着一有限长的通电螺线管,在盘的边缘均匀对称固定着若干带电金属小球。
In concentric with the shaft of the plate to lay on a finite length solenoid power, the edge of the plate with a number of symmetrical fixed charged metal ball.
在该盘上与转轴同心地放着一有限长的通电螺线管,在盘的边缘均匀对称固定着若干带电金属小球。
In concentric with the shaft of the plate to lay on a finite length solenoid power, the edge of the plate with a number of symmetrical fixed charged metal ball.
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