1. Immediately after closing switch, what is current through inductor? A] 0 B] 1/2 ampere C] 1 ampere D] 2 amperes

2. Immediately after closing switch, what is voltage across capacitor? A] 0 V B] 20 V C] 40 V D] 160 V

3. Immediately after closing switch, what is current through battery? A] 0 B] 1/2 ampere C] 1 ampere D] 2 amperes No current through inductor, no voltage across capacitor!

4. Immediately after closing switch, what is di/dt for the inductor? (Be careful!) A] 0 B] 20 kA/s C] 40 kA/s D] 0.5 kA/s No current through inductor, no voltage across capacitor! What would be the answer if there were no cap in parallel? C

5. A long time after closing the switch, what is the current through the capacitor? A] 0 B] 1/2 ampere C] 1 ampere D] 2 amperes

6. A long time after closing the switch, what is the current through the inductor? A] 0 B] 1/2 ampere C] 1 ampere D] 2 amperes

8. Critical damping gives the fastest return to equilibrium Also applies to car shocks & springs!

9. Alternating Current circuits

10. Phasors

11. Which phasor shows a current that is positive and increasing? Which phasor shows a current that is negative with an increasing magnitude (i.e. getting more negative?)