Step 3: If the aluminum foil ball is repelled away from the dish, the electroscope works.

步骤三：如果这颗铝箔球和锡箔烤盘彼此排斥，就表示你的验电器成功了。

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Step 3: If the aluminum foil ball is repelled away from the dish, the electroscope works.

步骤三：如果这颗铝箔球和锡箔烤盘彼此排斥，就表示你的验电器成功了。

youdao