(a) In an RLC series circuit as shown in Figure 2, R = 40 Q, L = 1 H, C = 16 x 104F, and the voltage source is E (t) = 100 cos 10t V. Determine the current i(t) in the circuit using the undetermined coefficients if at the initial time i(0) = 0, and q (0) = 0 C. Hint: Note that R d²q switch dq, 1 +R + dt² dt E (t) E and dq C Figure 2 (b) If R = 130 Q2, verify your answer for the current i(t) in part (a) using Laplace Transforms is 1 168 416 i(t) 3125 e 125t 3774 e sin 10t + cos 10t 629 629 Hint: Use partial fractions to simplify Q(s). -St 59

Delmar's Standard Textbook Of Electricity
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ISBN:9781337900348
Author:Stephen L. Herman
Publisher:Stephen L. Herman
Chapter24: Resistive-inductive-capacitive Parallel Circuits
Section: Chapter Questions
Problem 1RQ: An AC circuit contains a 24 resistor, a 15.9-mH inductor, and a 13.3F capacitor connected in...
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(a)
In an RLC series circuit as shown in Figure 2, R = 40 Q, L = 1 H, C = 16 x 104F, and
the voltage source is E (t) = 100 cos 10t V.
Determine the current i(t) in the circuit using the undetermined coefficients if at the
initial time i(0) = 0, and q (0) = 0 C.
Hint: Note that
R
d²q dq, 1
switch
+R +
dt² dt
C9=E(t)
E
and
dq
C
Figure 2
(b)
If R = 130 Q2, verify your answer for the current i(t) in part (a) using Laplace
Transforms is
168
416
i(t)
3125
3774
e ¹25t
e-St
-sin 10t +
cos 10t
629
629
Hint: Use partial fractions to simplify Q(s).
+
16
6
Transcribed Image Text:(a) In an RLC series circuit as shown in Figure 2, R = 40 Q, L = 1 H, C = 16 x 104F, and the voltage source is E (t) = 100 cos 10t V. Determine the current i(t) in the circuit using the undetermined coefficients if at the initial time i(0) = 0, and q (0) = 0 C. Hint: Note that R d²q dq, 1 switch +R + dt² dt C9=E(t) E and dq C Figure 2 (b) If R = 130 Q2, verify your answer for the current i(t) in part (a) using Laplace Transforms is 168 416 i(t) 3125 3774 e ¹25t e-St -sin 10t + cos 10t 629 629 Hint: Use partial fractions to simplify Q(s). + 16 6
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