electroscope

[电] 验电器英释中释nan apparatus for detecting an electric charge, typically consisting of a rod holding two gold foils that separate when a charge is applied

1 It was an electroscope which contained a small amount of radium..这是一个验电器，其中载有少量的镭。

2 As there was already pre-charge applied to the electroscope , an additional little charge caused reaction..由于已经有预充电适用于验电器，额外收取很少引起的反应。

3 In today's experiment you are going to build an electroscope to measure the static electricity of various household objects..今天的实验中，你会自己做一个验电器，来测量看看不同的家用品各会产生多少静电。