Question

Chapter 7, Problem 7.067

Find i(t) for t > 0 in the circuit in the accompanying figure using the step-by-step method.

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Please round all numbers to 3 significant digits.

i(t) = A

Answer 1

te 7 is shod Ciruded los Jer to 1v@ the tout date 13) 21-12], -10 (I, -J2) - 6 (5,- I3) = 0 21- 285, +10 I2 +6 Iz = 0 0 - 10 (32-I,) - 15 I. 20 25 32 = 103, -6 (33-31) – 633=0 1233 - 63. I = 233 - solving D. x gives 21-28 (2-53) Ho(4 53) +63320 21–4233 52 = A J-5. = (253) - BA duto) = 33-53= } - - e lotha info) As want through Lland and voltage source (H = i find + (igrital - ifind) e" where ? = h/Rea, dlage Instalneously, As it is a single sider Cirlent with

find i at t a 12 108 i (0) 21V Again Lis should at t o 1or Resisto is Completely shorted - Removed I 122 21 - PA 12+ 6x6 6+6 str 62 + A = 0.7A To To find Rea lors 62 7 ileg Req=roll (6+61112) 102 Req=sr 62% 24 ve S ise I see R 7 - ti ilt) = 0.7 + (-0.1 -0.7) e' Alt = 0.7 -0.8e al

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