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

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Presentation transcript:

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

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

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!

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

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

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

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

Alternating Current circuits

Phasors

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?)