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Given figure: Find Obtain i (t) for t>0

Given figure: Find Obtain i (t) for t>0

enter image description here

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Solution:

 ckt for t<0

enter image description here

from fig

I0=0

Amp

V0=0

volts

ckt. for

t0 in S domain form

enter image description here

KVL to 100p2e2SS25I(S)SI(S)6SI(S)=0I(S)[5+S+6S]=2e2SS2

I(S)[s2+5S+6S2S]=2e2s2I(s)=2e2s(s)(s2+5s+6)=e2s[2(s)(s2+5s+6)]=e2s[I1(s)]....(1) Where I1(s)=2(s)(s2+5s+6)=2(s)(s+2)(s+3)=AS+BS+2+CS+3....(2)A=2(s+2)(s+3)|s=0=2(2)(3)=13B=2(s)(s+3)|s=2=2(2)(2+3)=1c=2(s)(s+2)|s=3=2(5)(3+2)=23 from (2) I1(s)=1/3s+1s+2+2/3s+3 (3) ....(3)

put (3) in (1)

I(s)=e2s[1/3s1s+2+2/3s+3]=13e2ss1e2ss+2+23e2ss+3

Taking. I.L.T.

I(s)=13u(t2)e2(t2)u(t2)+23e3(t2)u(t2)I(s)=[13e2(t2)+23e3(t2)]u(t2)

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