7–82 A particular parallel RLC circuit has the step response observed on an oscilloscope and shown in Figure P7–82. Four points on the waveform were measured and are shown.

Determine the circuit’s initial value, final value, the dominant exponential’s time constant, and the likely case (A, B, or C) of the circuit response.

5 4.5 X: 0.07558- Y: 4.516 45 3.5 3 X: 0.2002 Y: 2.734 2.5 X: 0.01451 25 2 Y: 2.005 1.5 1 0.5 0 0 X: 0.4004 Y: 1.268 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45 0.5 Time in seconds FIGURE P7-82