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184_notes:examples:week10_current_ring [2021/07/07 17:41] – schram45 | 184_notes:examples:week10_current_ring [2021/07/07 17:42] – schram45 | ||
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<WRAP TIP> | <WRAP TIP> | ||
===Assumption=== | ===Assumption=== | ||
- | We assumed the current was flowing counterclockwise when the loop was viewed from the top. This means our current flows in the same direction as phi. If we had assumed a clockwise current flow then this value would just need a negative in front of it. | + | We assumed the current was flowing counterclockwise when the loop was viewed from the top. This means our current flows in the same direction as $\phi$. If we had assumed a clockwise current flow then this value would just need a negative in front of it. |
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<WRAP TIP> | <WRAP TIP> | ||
===Assumption=== | ===Assumption=== | ||
- | Assuming the current is steady allows us to take the $I$ out of the above integral, if this were not the case we would have to find out how current varies in the direction of phi and leave it in the integral. | + | Assuming the current is steady allows us to take the $I$ out of the above integral, if this were not the case we would have to find out how current varies in the direction of $\phi$ and leave it in the integral. |
</ | </ | ||