Chapter 32259P32.72(a)The instant after the switch is closed, the situationis as shown in the circuit diagram of Figure (a). Therequested quantities are:IIRIRVVVLCRLCR======000000,,,,εεεε∆∆∆(b)After the switch has been closed a long time, thesteady-state conditions shown in Figure (b) willexist. The currents and voltages are:IIIVVVLCRLCR======000000,,,,∆∆∆ε+–+–IL= 0VL=∆0IR= 0VR=∆0Q=ε0CVC=∆ε0ε0Figure (b)+–+–IL= 0VL=∆ε0VR=∆Q= 0VC=∆0ε0Figure (a)ε0IR=ε0/RIC=ε0/RFIG. P32.72P32.73When the switch is closed, as shown infigure (a), the current in the inductor is I:12 07 5010 000 267....−−=→=IIA .When the switch is opened, the initialcurrent in the inductor remains at 0.267 A.IRV= ∆:0 26780 0..AVafR≤R≤300 Ω(a)(b)FIG. P32.73P32.74(a)LN A1012172444101 0001 00100 5002 5110251==×⋅×=×=−
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