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184_notes:examples:week2_conducting_insulating_balls [2017/08/24 23:43] – [Example: Attempting to Charge Insulators by Induction] tallpaul | 184_notes:examples:week2_conducting_insulating_balls [2018/02/03 21:15] – tallpaul | ||
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===== Example: Attempting to Charge Insulators by Induction ===== | ===== Example: Attempting to Charge Insulators by Induction ===== | ||
- | In the notes on [[184_notes: | + | In the notes on [[184_notes: |
- | {{ 184_notes: | + | |
- | Is it possible to charge a pair of insulators using induction? Why or why not? | + | |
===Facts=== | ===Facts=== | ||
- | * Electrons in an insulator are tightly bound to the nucleus. | + | * Electrons in an insulator are tightly bound to the nucleus, so the atoms can polarize but charges |
- | * Charges | + | |
- | + | ||
- | ===Lacking=== | + | |
- | * An explanation for whether it is possible to charge a pair of insulators using induction. | + | |
- | + | ||
- | ===Approximations & Assumptions=== | + | |
- | * We are talking about pure insulators, so we can use the facts listed. | + | |
- | * By pure insulators, we mean there are no electrons on the surface that are not bound to any nuclei. | + | |
- | * By induction, we mean the process shown in the figure from the notes. | + | |
===Representations=== | ===Representations=== | ||
- | * We can model the atoms in an insulator as little ovals, that show when one side of the atom is more positive or negative than the other side. When ovals are not shown, this will just mean the atoms are not polarized. | + | |
- | * We can use a similar diagram as the induction figure in the notes, since we assume | + | {{ 184_notes: |
+ | | ||
+ | {{ 184_notes: | ||
+ | |||
+ | ===Goal=== | ||
+ | * Create an explanation for whether | ||
====Solution==== | ====Solution==== | ||
- | yeas | + | <WRAP TIP> |
+ | === Assumption === | ||
+ | Right away, we make the assumption that an induction process for insulators would look the same as it does for conductors. The reason we make this assumption is because this process, as described in the notes, is our basis for understanding how charging by induction works. If it looks the same and involves the same steps, we can more easily describe what we think will happen. | ||
+ | </ | ||
+ | |||
+ | We show the analogous " | ||
+ | |||
+ | {{ 184_notes: | ||
+ | |||
+ | The critical difference between conductors and insulators is that electrons can flow from one conductor to the other, but for insulators the electrons are bound to their nuclei. Because of this, the insulators do not charge by induction. |