试验电荷是为了探测电场，定量地描述电场性质而人为引入的一个理想电荷。
试验主体戴着含有60个电极的帽子，以此来测量由脑部产生的电荷。
The subjects wear a cap fitted with 60 electrodes, with the aim of measuring the electricity generated by the brain.
针对不均匀电场(棒-板间隙)中绝缘板上残余电荷对50%冲击闪络电压u _(50)的影响做了一些试验研究。
The effect of charges remaining on a dielectric plate upon the 50% impulse surface flashover voltage U_ (50) in the non-uniform field (rod-plane gap) is investigated.
介绍了粒子表面电荷测定法的原理、试验步骤及在纸机湿部控制方面的用途。
The paper introduces the principle, testing procedure of particle charge measurement and its applications in the control of wet end chemistry.
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