a device for detecting the presence and determining the sign of electric charges by means of electrostatic attraction and repulsion, often between two pieces of gold leaf enclosed in a glass-walled chamber.
更多electroscope例句
At any time in the drift, an electroscope exposed outside became rapidly charged.
The electroscope will now insulate well enough to show no appreciable collapse of the leaves in one or two hours' time.
The quartz electroscope is taken, and the insulating rod heated in the blow-pipe.
A charge is given to the electroscope, and the time required for a given degree of collapse of the leaves noted.
When a charged body is brought near the electroscope the leaves become charged similarly by induction.