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18. Given the electric network shown in Figure P1.6. Review] a. Write the differential equation for the network if v(t)- u(t), a unit step. b. Solve the differential equation for the current, i(t), if there is no initial energy in the network. c. Make a plot of your solution if R/L 1 i (t) FIGURE P1.6 RL network

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Ans. 18 (a) By KVL - Vets + Ritts + L dict $ the differential equation for vozu(t) ditt & Rist = { ult (b) using classical mefo icti= ist is = 1 | b [l-e-t] ucts so plot of ا م ( 0, 632 - - - * حد

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