For the circuit in Fig. 8.58, the capacitor voltage at t = 0 − (just before the switch is closed) is: (a) 0 V (b) 4 V (c) 8 V (d) 12 V Figure 8.58 For Review Questions 8.1 and 8.2.
For the circuit in Fig. 8.58, the capacitor voltage at t = 0 − (just before the switch is closed) is: (a) 0 V (b) 4 V (c) 8 V (d) 12 V Figure 8.58 For Review Questions 8.1 and 8.2.
For the circuit in Fig. 8.58, the capacitor voltage at t = 0− (just before the switch is closed) is:
(a) 0 V
(b) 4 V
(c) 8 V
(d) 12 V
Figure 8.58
For Review Questions 8.1 and 8.2.
Expert Solution & Answer
To determine
Choose the correct option to find the capacitor voltage at t=0− (just before the switch is closed).
Answer to Problem 1RQ
The correct option form the given choices is (a) 0 V.
Explanation of Solution
Calculation:
Redraw the given circuit as shown in Figure 1.
For the DC circuit, at the steady state condition when switch is open at t=0−, the capacitor acts as open circuit and the inductor act as short circuit. Therefore, the Figure 1 becomes as shown in Figure 2.
Since, the capacitor is open circuited, the voltage across the capacitor at t=0− is 0 V.
Therefore, the capacitor voltage at t=0− is vC(0−).
vC(0−)=0V
Therefore, the option (a) is correct and the options (b), (c), (d) are incorrect.
Conclusion:
Thus, the correct option from the given choices is (a) 0 V.
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Q1/Sketch the root locus for the system shown in Figure 1 and find the following:
a. The exact point and gain where the locus crosses the jo-axis b. The breakaway point
on the real axis c. The range of K within which the system is stable d. Angles of
departure and arrival
R(s) +
K(s²-4s +20)
C(s)
(s+2)(s + 4)
Exam2
Subject: (Numerical Analysis)
Class: Third
Date: 27/4/2025
Time: 60 minutes
Q1. For what values of k does this system of equations has no solution? (use Gauss-Jordan eliminations)
kx + y + z = 1
x+ky + z = 1
x+y+kz=1
Consider the Difference equation of a causal Linear time-invariant (LTI) system given
by: (y(n) - 1.5y(n - 1) + 0.5y(n = 2) = x(n)
a) Implement the difference equation model of this system.
b) Find the system transfer function H(z).
c) For an input x(n) = 8(n), determine the output response y(n).
d) Verify the initial value theorem y(0) with part (c).
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