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ece124: add don't care

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eggy
2023-01-26 15:03:20 -05:00
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@@ -214,3 +214,10 @@ $$dQ=\rho_s dS$$
!!! example
A rod of uniform charge density and length $L$ has a charge density of $p_\ell=\frac{Q}{L}$.
1. Determine the formula for the charge density $\rho$
2. Choose an origin and coordinate system (along the axes of the object when possible)
3. Choose an arbitrary point $A$ on the charge
4. Create a right-angle triangle with $A$, the desired point, and usually the origin
5. Attempt to find symmetry
6. Solve