Question

answer all 4question ....correctly.....thumbs up...

problem'1 The towers of a transmission ine are 36 m and spaced 300 m apart. They are joined a their tops by a ground wirc whose surge impedance is 540 Ω. The lower footing resistance is 25 Ω. Onc tower is struck by lightning. The lightning current rises linearly tea peak of 60 kA in 2 us before commencing to decline. Compute the tower top potential and the tower basc potcntial fmT the first microscoond after the stroke makes contact. The tower surge impedance is 140; that of the lightnin channel can be neglectcd. Assume all waves tel t 2.98 x 10mis. problem 2 Show that the circuit shown in Fig. is an equivalent circuit satisfied by the parameter equations 11- 21 0212-21) 21 problem3 Ri R2 R What class ofOp Amp is this, express the Vs elated to inputs Vi and V For R1-Rna-R:-1㏀ and R,-111㏀ what is山e total gain ofthe Op Amp circuit? problem 4 Convert the impedance circuit analog shown in Figure 2 to a mobility circuit using the "dot method discussed in class. RL1 RL2 La Rc2 Rci

answer all 4question ....correctly

Answer 1

2군 I+ 140 540 It군 40 30x 1021 ㄒ二 658s ą.im)= ;2.585一 =lo98 . 206 I xß

2 2,-군 군22-221 Leep. - T2 L222- 2

2. 2 A 그_ ns to, m entation op-Amp4 Vdと。 2 2

op-Amp-3 2. R2 R2

xcl at a Apply аз ーで RtR3 2. 2 Ri 3 2 R2

Apply kel fon ½tosl I-V Apply keL fvom v, to v 3

Vo= R3 2.R, R2 rol pApk iven Total gain = s[m け2% (III ) (3 Total gain = 333

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RLI L Rer Rci 乙 Loop-n Loop-1 step Place one dot within cach loop and ooles one ace one dot ithin each loop an outsidle all the loops above circuit has two loop s→ tuo dot inside Ind dot ootside slep2 comecldotsake sure thal hore is only connec dots Make Suie one line though cach element and thot no lnes mote than one lement CYo SS steps Drawin each line that cros ses an demen Diaw in ac its dual elemen ncudin the soure nclodin sp The cireut obteine d shouldhvand ive Obtaine ave an bokaseoa t onalb of onighal elchom MiV le H dual analoq af orisinal lechomeux

clement convestio n Serics exvalle va lle Ci Gr ルレーー RL 2 PaYaIc sevie s Rei he, cレ 노 2. conductance

イlv 코 Rぃ?. 니 Li Grc

Li u(个) F