Product Information Use this electroscope to detect electrostatic charges in a variety of objects. Physics teacher Ralph Fudge designed this device to give an instant visual indication of electrostatic charges in any object. Press the switch to turn the battery- operated unit on, bring a charged object near the metal plate on one end of the device and a green LED will light. The level of brightness determines the intensity of the charge. Operates on one 9V battery (included). Grades 7-12. Tell a Friend about this item
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