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Teacher Developed Classroom Tested

Compact, lightweight and ready to use, this apparatus lets your students determine (e) by one of two methods: allowing a selected sphere to fall through a measured distance with no electric field present — then applying an electric field and observing the velocity of the rising sphere; and by allowing a sphere to fall freely, then administering a high-voltage field until the sphere is suspended.
The unit’s all-in-one construction includes everything needed for a Millikan experiment: microscope, illuminator, 0 - 500 VDC voltmeter, and power inputs. Uses 120V, AC. The spray bottle system features a convenient reservoir that uses latex spheres.
Controls include polarity reversing switch, potentiometer for fine control of plate voltages, and a voltmeter. Measures 20 cm wide, 26 cm long, 23 cm high overall.

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