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| 184_notes:examples:week3_balloon_wall [2021/01/26 21:20] – [Solution] bartonmo | 184_notes:examples:week3_balloon_wall [2021/01/26 21:21] (current) – [Solution] bartonmo |
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| We can use the following representation, in which the balloon is motionless, to show how we are thinking of the balloon and the wall at this point: | We can use the following representation, in which the balloon is motionless, to show how we are thinking of the balloon and the wall at this point: |
| [{{ 184_notes:3_balloon_picture.png?200 |Negatively Charged Balloon Stuck to Wall}}] | [{{ 184_notes:3_balloon_picture.png?200 | Balloon Stuck to Wall (with charges shown)}}] |
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| We know that the balloon is negatively charged from rubbing it on wool/hair. When we bring the charged balloon close to the wall, the atoms in the wall near to the balloon become polarized with the electron clouds being pushed away from the negative balloon. See the notes on [[184_notes:charge_and_matter|Charges and Matter]] for more information on polarization. This means that the negative balloon is now //attracted// to the positive nuclei in the polarized wall. (The balloon is also repelled from the negative electron clouds, but since the nuclei are closer to the balloon, the attractive force is more powerful). | We know that the balloon is negatively charged from rubbing it on wool/hair. When we bring the charged balloon close to the wall, the atoms in the wall near to the balloon become polarized with the electron clouds being pushed away from the negative balloon. See the notes on [[184_notes:charge_and_matter|Charges and Matter]] for more information on polarization. This means that the negative balloon is now //attracted// to the positive nuclei in the polarized wall. (The balloon is also repelled from the negative electron clouds, but since the nuclei are closer to the balloon, the attractive force is more powerful). |