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Summary of Contents for PASCO AP-8210A
- Page 1 I n s t r u c t i o n M a n u a l ® 012-13093B 012-13093B Millikan Oil Drop Apparatus AP-8210A Plate Charging Chamber Cover Switch LED Light Source Droplet Viewing Chamber Platform Viewing Scope...
- Page 2 The cover page shows the PASCO AP-8210A Millikan Oil Drop Apparatus with a light-emitting diode (LED) light source. A power supply for the light source, a bottle of non-volatile oil, and a spray atomizer are included (but not shown). ®...
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Page 3: Table Of Contents
Table of Contents Introduction ............1 Equipment . - Page 4 M i l l i k a n O il D r o p A p p a r a t u s ® 012-13093B...
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Page 5: Introduction
AP-8210A -Introduction The PASCO Millikan Oil Drop Apparatus is designed to conduct the Millikan Oil Drop Experiment where the electric charge carried by a particle may be calculated by measuring the force experienced by the particle in an electric field of known strength. Although it is relatively easy to produce a known electric field, the force exerted by such a field on a particle carrying only one or several excess electrons is very small. - Page 6 M i l l i k a n O il D r o p A p p a r a t u s - I n t r o d u c t i o n Figure 2 shows the forces acting on the drop when it is rising under the influence of an elec- tric field.
- Page 7 M o d e l N o . A P - 8 2 1 0 A - I n t r o d u c t i o n eq. 10 is incorrect! Check the units of the Substituting equations ( 7 ) and ( 8 ) into equation ( 6 ) and rearranging yields: third term as you see they are inconsistent.
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Page 8: Equipment
M i l l i k a n O il D r o p A p p a r a t u s E q u i p m e n t Equipment The AP-8210A Millikan Oil Drop Apparatus includes the following: Included Equipment Part Number... - Page 9 M o d e l N o . A P - 8 2 1 0 A E q u i p m e n t Parts Diagram plate charging plate voltage switch connectors thermistor connectors LED light source droplet viewing brightness chamber adjustment...
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Page 10: Equipment Setup
It is electrical spacer not regulated in its use and poses no hazard to the user of the connector PASCO Millikan Oil Drop Apparatus.. base of apparatus Equipment Setup Adjusting the environment of the experiment room Make the room as dark as possible, while allowing for... -
Page 11: Aligning The Optical System
M o d e l N o . A P - 8 2 1 0 A E q u i p m e n t Adjusting the height of the platform and leveling it Place the apparatus on a level, solid table adjust to with the viewing scope at a height that per- comfortable eye... -
Page 12: Functions Of Controls
M i l l i k a n O il D r o p A p p a r a t u s E q u i p m e n t Plug the included AC adapter into a receptacle (100 to 240 VAC) and connect the cable to the power jack on the side of the LED light source.. -
Page 13: Determining The Temperature Of The Droplet Viewing Chamber
M o d e l N o . A P - 8 2 1 0 A E q u i p m e n t Determining the Temperature of the Droplet Viewing Chamber Connect the multi meter to the thermistor connectors on the platform in order to measure the resistance of the thermistor that is embedded in the lower capacitor plate. - Page 14 M i l l i k a n O il D r o p A p p a r a t u s E q u i p m e n t • NOTE: Remember that the droplets are being forced into the viewing area by the pressure of the atomizer. Excessive pumping of the atomizer can cause too many droplets to be forced into the viewing area and, more importantly, into the area between the chamber wall and the focal point of the viewing scope.
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Page 15: Computations Of The Charge Of An Electron
M o d e l N o . A P - 8 2 1 0 A E q u i p m e n t Introduce more oil droplets into the chamber using the procedure previously described and select another droplet. -
Page 16: Using A Projection Microscope With The Millikan Oil Drop Apparatus
Using a Projecting Microscope with the Millikan Oil Drop Apparatus To demonstrate Millikan’s experiment for an entire classroom on a TV screen or computer monitor, use a project- ing microscope such as the Ken-A-Vision VideoFlex Microscope (PASCO Model SE-7227). Procedure Put a white paper screen in the droplet viewing 1. -
Page 17: Historical Information
M o d e l N o . A P - 8 2 1 0 A H i s t o r i c a l I n f o r m a t i o n Historical Information Historical Notes The Greeks were the first to report the effects of electricity when they recorded that rubbed amber attracted light objects. - Page 18 M i l li k a n O il D r o p A p p a r a t u s H i s t o r i c a l I n fo r m a t io n droplet formed around only one ion) proved to be only approximately correct, and the experimental methods were not adequate to provide a precise determination of e.
- Page 19 M o d e l N o . A P - 8 2 1 0 A H i s t o r i c a l I n f o r m a t i o n Experiments with the balanced water drop produced the value of 3.422 x l0 e.s.u.
- Page 20 M i l li k a n O il D r o p A p p a r a t u s H i s t o r i c a l I n fo r m a t io n Millikan, Robert A., p.
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Page 21: Maintenance Notes
M o d e l N o . A P - 8 2 1 0 A M a i n t e n a n c e N o t e s Few experiments that are so simple in principle have provided such a wealth of experimental evidence to confirm the atomic theory and measure an important physical constant. -
Page 22: Adjusting The Horizontal Reticle Alignment
M i l l i k a n O il D r o p A p p a r a t u s M a i n t e n a n c e N o t e s Recheck the reticle to assure that it is still in proper alignment with the focusing wire (as in step 2). Lock the viewing scope into position by tightening the set screw into the viewing scope holder. -
Page 23: Viscosity Of Dry Air As A Function Of Temperature
M o d e l N o . A P - 8 2 1 0 A A p p e n d i x A : V i s c o s i t y o f D r y A i r a s a F u n c t i o n o f T e m p e r a t u r e Appendix A: Viscosity of Dry Air as a Function of Temperature Viscosity of Dry Air as a Function of Temperature... -
Page 24: Thermistor Resistance At Various Temperatures
M i l l i k a n O il D r o p A p p a r a t u s A p p e n d i x B : T h e r m i s t o r R e s i s t a n c e Appendix B: Thermistor Resistance Millikan Oil Drop Apparatus Thermistor Resistance at Various Temperatures THERMISTOR RESISTANCE TABLE...
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