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This is a very interesting problem that i cant figure out. please answer the question clearly and show all work.

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A voltage source, in the circuit shown below, is short-circuited at its terminals by closing switch Si. At the time the switch is closed, the circuit has been in operation for a long time. Circuit values. Vs- 480 V Rs-1 S RI 10 ? R2 15? L1-2 mH L2-12 mH a) Find the initial value of the current through the switch that short-circuits the power supply (t0+) b) Find the final value of the current through the switch (t - co) c) Derive the expression for the current through Si (0 <t s o) d) Find the magnitude of the short-circuit current through the switch 100 ms after the switch is closed? Sketch the short circuit current through Si as a function of time. e) Source Load 1

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ts 480V 15 70 lo 1 忑alor)= 27.42 41-14 27-42 Ao 4.8o-4- 2742 R2. 1 5 A- -하.gm 0-(0-2742) eteen 27 4-32 125ot : 1250tENG

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