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--- 184_notes:examples:week2_electric_potential_positive_point [2018/01/24 16:49] – tallpaul
+++ 184_notes:examples:week2_electric_potential_positive_point [2018/01/24 17:03] – tallpaul
@@ Line 18: / Line 18: @@
   * Find the electric potential at $P$.
-===Approximations & Assumptions===
+====Solution====
-  * The balloon's electric field outside the balloon acts like a point charge centered at the center of mass of the balloon.
+<WRAP TIP>
-  * The electric potential infinitely far away from the balloon is $0 \text{ V}$. Read [[184_notes:superposition#Superposition_of_Electric_Potential|here]] for why this is important.
+=== Approximation ===
+We approximate the balloon as a point charge. We do this because we have the tools to find the electric potential from a point charge. This seems like a reasonable approximation because the balloon is not too spread out, and we are interested in points outside the balloon. so the balloon might "look" like a point charge from the perspective of an observation location that is little far away.
+</WRAP>
+<WRAP TIP>
+=== Assumption ===
-====Solution====
+The electric potential infinitely far away from the balloon is $0 \text{ V}$. Read [184_notes:superposition#Superposition_of_Electric_Potential|here]] for why this is important.
+</WRAP>
 The electric potential at $P$ is given by