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Can you please explain Q7.2? I have the answers here, but I'm having trouble understanding what is happening to the circuit when the switch is at b.

7.2 At 0, the switch in the circuit shown moves instantaneously from position a to position b a) Calculate vo for t 0. b) What percentage of the initial energy stored in the inductor is eventually dissipated in the 4 Ω resistor? 6 2 102 0.32 H3 4 6.4 A Answer: a) -8e-10r V,t 0; b) 80%.


How is it possible to draw a circuit this way when there is no return path? (please see my hand drawing).

-t 2 what is this(

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