Problem 24-1    Source:   Example 8.1 - page 177 - NILSSON, James W. & RIEDEL, Susan A. - Book: Circuitos Elétricos - Editora LTC - 5ª edição - 1999.

In the circuit shown in the Figura 24-01.1, we have to R = 200 Ω, L = 50 mH and C = 0.2 µF. Determine:

a) the roots of the characteristic equation that describes the transient behavior of the circuit.

b) Is the circuit response over-damped, under-damped, or critically damped?

c) repeat the items (a) and (b) to R = 312.5 Ω.

d) what should be the value of R for the answer to be critically damped?

Problem 24-2    Source:   Problem elaborated by the author of the site.

In the circuit shown in the Figura 24-02.1, determine:

a) to t = 0⁺ the values of i₁, i₂, i₃, i₄, e_C, e_L.

b) repeat calculation of item variables a) to t → ∞

Problem 24-3    Source:   Problem 8-49 - page 324 - Book: Fundamentos de Circuitos Elétricos - ALEXANDER, Charles K. & SADIKU, Matthew N. - Ed. McGraw Hill - 5ª edição - 2013.

In the circuit shown in the Figura 24-03.1, determine i(t) to t > 0 knowing that the switch S has been closed for a long time.

Problem 24-4    Source:   Adapted from Question 3 of the Electrical Circuit Test II of PUCRS - 2019.

a) In the circuit shown in the Figura 24-04.1, determine the value of R_x so that the circuit has an underdamped response with oscillation frequency ω_d = 0.5 rad/s

b) After determining the value of R_x, determine the answer i_L (t) if V_i = 10 u_-1 (t).

Problem 24-5    Source:   Adapted from Question 1 of the PUCRS II Electrical Circuits Test - 2019.

a) Determine the value of v_c (t) for t > 0 knowing that the circuit is in steady state when the switch is in the position shown in Figure 24-05.1 for t < 0 .

b) Graph the system response. Making R = 5 Ω, redo the graph and compare with the previous one.

Problem 24-6    Source:    Question 3 - 3rd test Electrical Circuits I - Ufrgs - 2018.

In the circuit shown in Figure 24-06.1, the switch was in the closed position for a long time. At t = 0 the switch is opened. Determine i_L(t) for t ≥ 0.

Problem 24-7    Source:   Adapted from Question 1 of the PUCRS II Electrical Circuits Test - 2019.

a) Determine the value of i_L (t) for t > 0 knowing that the circuit is in steady state when the switch is in the position shown in Figure 24-07.1 for t < 0 .

b) Graph the system response.

Problem 24-8    Source:   Adapted from Question 1 of the PUCRS II Electrical Circuits Test - 2019.

Determine the value of i_L (t) and v_L (t) to t > 0 knowing that the circuit is in steady state when the switch is in the position shown in Figure 24-08.1 for t < 0 .

Problem 24-9    Source:    Question 31 - List of Electrical Circuits II - University of Algarve - Instituto Superior de Engenharia - Jorge Semião - 2009.

The switch in the circuit shown in Figure 24-09.1 has been open for a long time. At t = 0 it is closed. Calculate i_L (t) for t ≥ 0.

Problem 24-10    Source:    Problem 8.14 - page 329 - NILSSON, James W. & RIEDEL, Susan A. - Book: Electric Circuits - Publisher Pearson Education do Brasil - 10th edition - 2016.

The switch in the circuit shown in Figure 24-10.1 has been in position a for a long time. At t = 0 it instantly moves to position b. Determine V_o (t) for t ≥ 0.

Problem 24-11    Source:    Problem 8.35 - page 331 - NILSSON, James W. & RIEDEL, Susan A. - Book: Electric Circuits - Publisher Pearson Education do Brasil - 10th edition - 2016.

The switch in the circuit shown in Figure 24-11.1 has been in position a for a long time. At t = 0 it instantly moves to position b. Determine V_C (t) and i_L (t) for t ≥ 0.