Question

Problem 4 = 20A Find i(t) and v(t) for t > 0 in the circuit below if i(0) 2 H 202 5Ω v(t) 1Ω Problem 5 If the switch in circuit below has been open for a long time and is closed at t = 0, find vo(t) a. Suppose that the switch has been closed for a long time and is opened at t = 0. Find vo(t). b. t = 0 2Ω WW 3 F 4Ω 18 V

Answer 1

į (o) -20 ; 1(c) : 0 ( soulle fres i(t) = i fory tlio -colett pa Resort į Lun How from 5 x 20 ti : 60 25 Rega 5420 + ass pa : i() = 20 e=25€ io e il) * to los --4 € 25A Volt= 20 io = -80 e 2.5t v

5) Vole) a Vies + [vo - Voleilly at tao surtch is open: No supply to Capacitor .. Vel) a ov at t=0 Switch is closed Capacitor is fully charged 4 act as ones. 2 M uz رم MOJ = 18* 12 V mi Rxc Rhee = do everything 31.333 ņa 1333x 3.4 :v (t) = 12 + (0-mé /4 VBS - iP[ime=0.258] v

b) Switch is closed at tao 2 bvo 18 7 - [ uz 7 que Nepsa 1885 : 12v at tio switch is opers; Veloos zov ( No supply to al t>0 LN Té ux312 Velas : 0 + 112-oj e l 12 Veles : 12 € 0.08337