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--- course_planning:184_projects:s19_project_15 [2019/04/25 00:05] – [Project 15A: Circuits Review, featuring EM-boar tigers] tallpaul
+++ course_planning:184_projects:s19_project_15 [2019/04/25 17:50] (current) – [Project 15B: Circuits Review, featuring EM-boar tigers] tallpaul
@@ Line 20: / Line 20: @@
 Good Luck!
-==== Project 15A: Circuits Review, featuring EM-boar tigers ====
-As a last ditch effort to save your friends from the EM-boar tigers, you and your team realize the power grid of the city ranges long and far just reaching the outskirts of the EM-boar tiger lair where your friends are. See the map for a view of the 5 km by 5 km power with the lair lying just north of the grid. You must devise a plan that will pull the EM-boar tigers away from the base. From experimentation on previously captured EM-boar tigers shows that they can weigh up to 130 kg (see this [[183_notes:supplemental|documentation]] on normal boar tigers) and
+==== Project 15B: Circuits Review, featuring EM-boar tigers ====
+As a last ditch effort to save your friends from the EM-boar tigers, you and your team realize the power grid of the city ranges long and far just reaching the outskirts of the EM-boar tiger lair where your friends are. See the map for a view of the 5 km by 5 km power with the lair lying just north of the grid. You must devise a plan that will pull the EM-boar tigers away from the base. From experimentation on previously captured EM-boar tigers shows that they can weigh up to 130 kg and travel at a velocity of 49 km/h (see this [[183_notes:supplemental|documentation]] on normal boar tigers). They also each individually have a charge of 200 C. You must figure out a way to save your friends located at the lair. A hoard of 100 EM-boar tigers is traveling at top-speed due east towards the lair, and the only solution you can think of is to ramp up the current running through the power grid. You need to exert a force of at least 300 N on hoard as a whole in order to distract the EM-boar tigers and allow your friends time to escape during the distraction. Each resistor in the diagram is 10 $\Omega$, and the power source has a variable voltage. Your job is to determine the voltage needed to save your friends.
+{{ 184_notes:spring19_15b_circuit.png?600 |Circuit}}
+<WRAP info>
+=== Learning Goals ===
+  * Review of circuits, especially combining resistors
+  * Review of magnetic fields and forces, right-hand-rule
+</WRAP>
+=== Extension Questions ===
+**1. How does the problem change if a capacitor is added in series to the southeast corner of the circuit?**
+**2. Once the circuit reaches a steady state with the added capacitor, what is the voltage across the capacitor?**