Chapter 31: AC Circuits Puzzles

The figure shows a graph of the current in a series RLC circuit, I=I_maxcos(t). There are five points marked on the graph, labeled A, B, C, D, E. Please state at which point (or points) each of the following quantities are a maximum, a minimum, or zero:

• The energy stored in the inductor
• The voltage across the capacitor
• The power input to the capacitor
• The power output by the inductor
• The charge on the capacitor
• The voltage across the resistor

Please answer this in words, not equations, briefly explaining how you obtained your answer.

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