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Summary of Contents for PASCO ES-9070
- Page 1 Includes 012-03760E Instruction Manual and Teacher's Notes 05/99 Experiment Guide for Typical Experiment Results the PASCO scientific Model ES-9070 COULOMB BALANCE © 1989 PASCO scientific $5.00...
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Page 3: Table Of Contents
012-03760E Coulomb Balance Table of Contents Section Page Copyright, Warranty and Equipment Return ........... ii Introduction ..................... 1 Theory ......................2 Equipment ......................3 Additional Equipment Recommended: ............. 3 Tips for Accurate Results ................4 Setup ......................5 Experiments: Part A Force Versus Distance ..............7 Part B Force Versus Charge .............. -
Page 4: Copyright, Warranty And Equipment Return
Copyright Notice Equipment Return The PASCO scientific 012-03760E Coulomb Should the product have to be returned to PASCO Balance manual is copyrighted and all rights scientific for any reason, notify PASCO scientific reserved. However, permission is granted to non-... -
Page 5: Introduction
012-03760E Coulomb Balance Introduction charged spheres torsion wire slide assembly Tips for Accurate Results Figure 1. Experimenting with the Coulomb Balance... -
Page 6: Theory
Coulomb Balance 012-03760E Theory NOTE: ä –16... -
Page 7: Equipment
012-03760E Coulomb Balance Equipment Setup NOTE: ä charging probe COULOMB BALANCE magnetic damping arm index arm torsion wire retainer calibration (pendulum) support tube coupling Plate conductive sphere on insulating toolbox with: thread one 50 mg mass spare torsion wire two 20 mg masses (3 meters) one hex key torsion wire... -
Page 8: Tips For Accurate Results
Coulomb Balance 012-03760E Tips for Accurate Results IMPORTANT:... -
Page 9: Setup
012-03760E Coulomb Balance Setup Note – Threading the Torsion Wire: ä copper rings counterweight 1. Loosen the top vane thumbscrew support 2. Loosen the side tube thumbscrew and rotate the index arm so it is parallel with the base of the lateral support bar Coulomb Balance. - Page 10 Coulomb Balance 012-03760E Align the spheres laterally Position the slide arm Position the spheres Slide Assembly Setup (Refer to Figure 5) Connect the slide assembly Align the spheres vertically top view side view Figure 5. Slide Assembly Setup...
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Page 11: Part A Force Versus Distance
012-03760E Coulomb Balance Experiment: (Part A) Force Versus Distance Procedure suspended sphere sliding sphere pendulum slide assembly assembly × Figure 6. Experimental Setup IMPORTANT: Tips for Accurate Results ä Analysis NOTE: ä Explanation:... -
Page 12: Part B Force Versus Charge
Coulomb Balance 012-03760E Corrections to the data B = 1 – 4 To correct your data: corrected corrected (Part B) Force Versus Charge Method I: Method II:... -
Page 13: Part C The Coulomb Constant
012-03760E Coulomb Balance (Part C) The Coulomb Constant F = k center line Measuring the Torsion constant, K mass copper rings support tube lateral support bar Figure 7. Calibrating the Torsion Balance a. Calculate the weight for each set of masses that you used. b. - Page 14 Coulomb Balance 012-03760E Measuring the Charges, q and q Method I: –12 NOTE: ä Method II: Conductive sphere on an insulating thread Electrometer Faraday ice pail Figure 8. Measuring the Charge with an Electrometer and a Faraday Ice Pail test test test test...
- Page 15 012-03760E Coulomb Balance test test Calculations for the Coulomb Constant corrected corrected...
- Page 16 Coulomb Balance 012-03760E Table 1. Force versus Distance Data and Calculations corrected Table 2. Force Calibration Data and Calculations Table 3. The Charge on the Sphere...
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Page 17: Replacing The Torsion Wire
012-03760E Coulomb Balance Replacing the Torsion Wire IMPORTANT—When Replacing the To replace the torsion wire, follow the numbered steps ä Wire: in Figure 9. When you're done, follow the instructions in the Setup section of this manual to balance the pen- dulum and to zero the torsion balance. - Page 18 Coulomb Balance 012-03760E . a. Using the torsion wire . a. Carefully lay the torsion clamp and a spring balance on its side. balance, pull the wire b. Thread the wire through with a force of the hole in the torsion approximately 4 knob.
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Page 19: Teacher's Guide
If you have any explanations for this error, or Distance (cm) suggestions about how to improve it, please let us know. Call PASCO Technical support at (800) 772- A power regression of this data shows that there is 8700. an inverse-square dependence, as predicted by... - Page 20 Coulomb Balance 012-03760D Notes...
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Page 21: Technical Support
Contacting Technical Support If you have any comments about the product or manual, Before you call the PASCO Technical Support staff, it please let us know. If you have any suggestions on would be helpful to prepare the following information:...
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