10/23/12 We decided to buy a 1M ohm potentiometer as well as some 10M ohm resistors. When using this we broke the dielectric of air. We solved this by increasing the voltage using the resistor. But the ball still wouldn't move. In order to remove the ball from between the plates we blew the ball out but instead of leaving the plates the air passing over it ionized the ball and made it oscillate as shown below.
This is a recreation of Millikan's Oil Drop Experiment d by Mt San Antonio College's Society of Physics Students. The objective is to crate an apparatus to verify the charge of an electron and get the most accurate readings possible. The results will be entered in the CIE poster board competition 2012.
Thursday, September 27, 2012
Progress with Prototype
10/24/12 Today we set up the first prototype we tried using various oils but we could not make out any distinct effects on the drops. When trying to use the microscope to see the drops we took about 20 minutes trying to get it in focus but with not much success. With this we decided to try using the nylon ball. We used a funnel to get the ball through the plates. When dropping the ball through the field the ball fell straight to the plate without bouncing, as it did when the plates weren't charged. But we were unable to get the ball todo anything other then drop.
10/23/12 We decided to buy a 1M ohm potentiometer as well as some 10M ohm resistors. When using this we broke the dielectric of air. We solved this by increasing the voltage using the resistor. But the ball still wouldn't move. In order to remove the ball from between the plates we blew the ball out but instead of leaving the plates the air passing over it ionized the ball and made it oscillate as shown below.
10/23/12 We decided to buy a 1M ohm potentiometer as well as some 10M ohm resistors. When using this we broke the dielectric of air. We solved this by increasing the voltage using the resistor. But the ball still wouldn't move. In order to remove the ball from between the plates we blew the ball out but instead of leaving the plates the air passing over it ionized the ball and made it oscillate as shown below.
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