The Milikan Oil Drop experiment an experiment where you measure the elementary electric charge of an electron. This is done by examining tiny charged droplets between two electrodes. The plates are charged to the point where the droplets were at mechanical equiplibrium. From this the charge of the electron (based on the size of the droplets and the material of the droplet.).
United Scientific’s Milikan Oil Drop Apparatus allows modern physics students to perform the Oil Drop Experiment in their own lab.
This Milliklan Oil Drop Apparatus is hooked up to a computer via USB cable where the results can be studied. A version with a monitor is also available. The apparatus consists of an oil drop chamber with a mercury lamp, a digital voltmeter, a CCD camera, an atomizer, and a digital timer. Software is also included.
The Oil Drop Chamber is made of an accurately dimensioned polymer cyclinder with two precisely machined paralell end plate electrodes. The cylinder has an illumination opening, an observation opening, and a quartz glass window to exclude drafts. The entire oil drop chamber is housed in a cylindrical dreaft shield. Oil drops fall from a an oil mist chamber above the draft shield into the oil drop chamber through a hole of 0.4mm diameter in the uppoer electrode plate. They are illuminated by an LED.
A built in timer allows users to conveniently measuer the time it takes an oil drop to complete a motion through a measured distance. The distance can be measured on the monitor or via the computer link. Voltage is adjusted via the balancing voltage control and the balancing votlage switch. It can be varied from 0-500V with the control knob.
Two methods for measuring the elementary electric charge of an electron are descreibed in the manual: The Balance method and the Ris and Fall Method.
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