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一、构造:①一个大试管,一端封闭,另～端用插入铜条的软木塞封闭。②玻璃管外面绕上多匝铜丝或导线,放在支架上。⑨感应起电机(或用感应圈加12伏直流电源)。④导线2—4根。⑤香烟火柴等。装置如下图:二、演示方法:
First, the structure: 1 a large test tube, one end is closed, and the other end is closed with a cork inserted into the copper strip. 2 The glass tube is wrapped with copper wire or wire and placed on the bracket. 9 Induction motor (or induction coil plus 12 V DC power supply). 4 wires 2-4 roots. 5 cigarette matches, etc. Device as shown below: Second, demonstration method: