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| 184_notes:examples:week14_b_field_capacitor [2018/08/09 19:23] – curdemma | 184_notes:examples:week14_b_field_capacitor [2021/07/22 13:51] (current) – schram45 | ||
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| ===Approximations & Assumptions=== | ===Approximations & Assumptions=== | ||
| * We are only concerned about a snapshot in time, so the current is $I$, even though this may change at a later time as the capacitor charges. | * We are only concerned about a snapshot in time, so the current is $I$, even though this may change at a later time as the capacitor charges. | ||
| - | * The electric field between the plates is the same as the electric field between infinite plates (we'll ignore the electric field at the edges of the capacitor). | + | * The electric field between the plates is the same as the electric field between infinite plates (we'll ignore the electric field at the edges of the capacitor): This allows us to assume the electric field is constant between the plates. This is a good assumption with two big plates that are very close together. |
| - | * The electric field outside the plates is zero. | + | * The electric field outside the plates is zero: This also ties back to having two big plates separated by a small distance. Making this assumption allows us to simplify down our equations when calculating the flux through our surface. |
| ===Representations=== | ===Representations=== | ||