Physics Essentials - 008

Elementary Charge

AP Physics 1

AP Physics 2

0 x 2x 3x-x-2x-3x

Robert Millikan

1.6 x 10-19 C

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Electric Charge

Quantized

1.6 x 10-19 C

Electrons

Protons

negative

positive

More massive

Elementary Charge

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- - - - - - - -

+ + + + + + + +

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Elementary Charge

0 e 2e 3e-e-2e-3e

e = 1.6 x 10-19 C

Charge Quantization

Proton

2/3 e 2/3 e

-1/3 ebozemanscience.com

Protons

Neutrons

Electrons

+e

0 e

-e

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Did you learn?

To challenge the claim that an electric charge smaller than the elementary charge has been isolated.

AP Physics 1

AP Physics 2

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"Atom." Wikipedia, the Free Encyclopedia, May 8, 2014. http://en.wikipedia.org/w/index.php?title=Atom&oldid=607300203.!Dilmen, Nevit. SVG Files, 2009. Own work. http://commons.wikimedia.org/wiki/File:Howtodraw-cartoon-astranaut_nevit_081.svg.!"File:Millikan's Oil-Drop Apparatus 1.jpg." Wikipedia, the Free Encyclopedia. Accessed May 10, 2014. http://en.wikipedia.org/wiki/File:Millikan%E2%80%99s_oil-drop_apparatus_1.jpg.!"File:Quark Structure Proton.svg." Wikipedia, the Free Encyclopedia. Accessed May 10, 2014. http://en.wikipedia.org/wiki/File:Quark_structure_proton.svg.!"File:Robert Andrews Millikan.jpg." Wikipedia, the Free Encyclopedia. Accessed May 10, 2014. http://en.wikipedia.org/wiki/File:Robert_Andrews_Millikan.jpg.!Gregors, Simplified_scheme_of_Millikan's_oil-drop_experiment png: Theresa Knottderivative work: English: Simplified Scheme of Millikan's Oil-Drop Experiment., August 13, 2004. Simplified_scheme_of_Millikan's_oil-drop_experiment.png. http://commons.wikimedia.org/wiki/File:Simplified_scheme_of_Millikan%E2%80%99s_oil-drop_experiment.svg.!Hmilch. English: X-Ray Tube (scheme), December 23, 2008. Own work. http://commons.wikimedia.org/wiki/File:Roentgen-Roehre.svg.!NASA. English: European Space Agency Astronaut Andre Kuipers, Expedition 31 Flight Engineer, Uses a Body Mass Measurement Device (BMMD) in the Zvezda Service Module of the International Space Station., June 26, 2012. http://spaceflight.nasa.gov/gallery/images/station/crew-31/html/iss031e157943.html. http://commons.wikimedia.org/wiki/File:ISS-31_Andr%C3%A9_Kuipers_uses_a_body_mass_measurement_device.jpg.

Acknowledgements

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