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| 184_notes:examples:week2_conducting_insulating_balls [2018/05/17 16:22] – curdemma | 184_notes:examples:week2_conducting_insulating_balls [2021/01/25 00:25] (current) – bartonmo |
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| ===Representations=== | ===Representations=== |
| * From the notes, we can pull a representation for how we would charge //conductors// using induction: | * From the notes, we can pull a representation for how we would charge //conductors// using induction: |
| {{ 184_notes:induction.png?300 |Induction with Conductors}} | [{{ 184_notes:induction.png?300 |Induction with Conductors}}] |
| * We can model the atoms in an insulator as little ovals (like the one below), 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 model the atoms in an insulator as little ovals (like the one below), 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. |
| {{ 184_notes:polarizedatom.png?100 }} | [{{ 184_notes:polarizedatom.png?100|Polarized Atom }}] |
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| ===Goal=== | ===Goal=== |
| We show the analogous "induction with insulators" with a step-by-step representation below. We knew from the facts that electrons cannot move freely between insulators, which is one of the key differences between insulators and conductors. At time $t=t_0$, both of the insulating balls start out as neutral. At time $t=t_1$, when the connected balls are moved close the charged object, the atoms in the insulators would polarize, but the electrons are not free to move further or to move from one ball to the next. This means when the insulating balls are separated at $t=t_2$, there are two polarized but overall neutral balls. As the balls are pulled farther away from the positive charge, they become less and less polarized, eventually returning to the same state that they were before at $t=t_0$ (neutral, not polarized). | We show the analogous "induction with insulators" with a step-by-step representation below. We knew from the facts that electrons cannot move freely between insulators, which is one of the key differences between insulators and conductors. At time $t=t_0$, both of the insulating balls start out as neutral. At time $t=t_1$, when the connected balls are moved close the charged object, the atoms in the insulators would polarize, but the electrons are not free to move further or to move from one ball to the next. This means when the insulating balls are separated at $t=t_2$, there are two polarized but overall neutral balls. As the balls are pulled farther away from the positive charge, they become less and less polarized, eventually returning to the same state that they were before at $t=t_0$ (neutral, not polarized). |
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| {{ 184_notes:inducing_insulators.png?300 |Induction with Insulators}} | [{{ 184_notes:inducing_insulators.png?300 |Induction with Insulators}}] |
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| 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. | |
| | //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.// |