Direct Current and Transient Analysis 215
P.2.22 The RL circuit in Figure 2.118 presents an initial current i(0) = 0 A at the instant the
switch closes at t = 0, where it remains indefi nitely. Write a program that returns
the following plots over the range 0 ≤ t ≤ 10 s:
a. [Current i(t)] ver su s t
b. Voltage vR (t) versus t
c. Voltage vL (t) versus t
d. [Energy wL in Joules stored in L] versus t
e. [Power in watts dissipated by R] versus t
P. 2. 2 3 D e t e r m i n e VL 2 and VC 2 shown in the circuits of Figure 2.119 in a tablelike format;
given V = 100 V, L 2 = 10 H, and C 2 = 10 F for the following cases:
a. L 1 varies from L 2 /2 to 2L 2 in linear steps of L 2 /10.
b. C 1 varies from C 2 /2 to 2 C 2 in linear steps of C 2 /10.
P.2.24 For the circuit diagrams shown in Figure 2.120
a. Evaluate by hand the expressions for the current I 1
b. Plot I 1 as a function of L 2 , if L 1 = 5 H and L 2 varies over the range 0 ≤ L 2 ≤ 15 H
in steps (increments) of 0.5 H
c. Repeat part b for the case where C 1 = 5 F and C 2 varies over the range 0 ≤ C 2 ≤ 15 F
in steps (increments) of 0.5 FFIGURE 2.120
Networks of P.2.24.1 A L 1 1 A(a)I 1 L (^2) C
2
I 1 C 1
(b)
FIGURE 2.121
Network of P.2.25.
V 0 = 100 V
R 3 = 3 Ω
R 1 = 10 Ω R 2 = 15 Ω
R 4 = 30 Ω
I (^1) I 2 I 5
I 3 C 1 = 1 F I 4
C 2 = 2 F L = 1 H
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