Problem 54-1    Source:  Problem 6.26 - page 103 - EDMINISTER, Joseph A. - Book: Circuitos Elétricos - Ed. McGraw Hill - 1971

The voltage drop at the j2 reactance of the series circuit in the Figure 54-1.1 is V_L = 13.04 ∠+15°. Determine the value of Z.

Problem 54-2    Source:  Problem 6.7 - page 95 -   EDMINISTER, Joseph A. - Book: Circuitos Elétricos - Ed. McGraw Hill - 1971

The effective values of currents I₁ , I₂ and I_T are respectively 18 , 15 and 30 A. Determine the unknown impedances R and X_L.

Problem 54-3    Source:  Exercise 8-31 - page 421 -    THOMAS, Roland E. , ROSA, Albert J. , THOUSSAINT, Gregory J. -   Book: The Analysis & Design of Linear Circuits - 6ª Edição - Ed. John Willey & Sons, Inc. - 2009.

Use the nodal method to calculate I₁, I₂ and I₃ of the circuit shown in the Figure 54-3.1.

Problem 54-4    Fonte:   Problem 1 - RLC Problem List - Discipline Engineering School Electrical Circuits - UFRGS - 2011 - Prof. Dr. Valner Brusamarello.

Determine the impedance Z in the circuit shown in Figure 54-4.1, so that we have I₂ = 10 ∠0°.

Problema 54-5    Source:   Adapted from Example 8-25 - page 421 -    THOMAS, Roland E. , ROSA, Albert J. , THOUSSAINT, Gregory J. -   Book: The Analysis & Design of Linear Circuits - 6ª Edição - Ed. John Willey & Sons, Inc. - 2009.

Use the current loop method and find the output voltage V₂ and the input impedance Z_in of the circuit shown in the Figure 54-5.1.

Problem 54-6    Source:  Problem 6.10 - page 96 - EDMINISTER, Joseph A. - Book: Circuitos Elétricos - 1ª ed. - Ed. McGraw Hill - 1971

In the series-parallel circuit of the Figure 54-6.1 the effective value of the voltage between the points a-b, is 50 volts. Knowing that Z = 8.5∠30°, find the value of V.

Problem 54-7    Source:   Problem 7 - RLC Problem List - Discipline Electrical Circuits of the School of Engineering - UFRGS - 2017 - Prof. Dr. Valner Brusamarello.

In the circuit shown in Figure 54-07.1 we know that E = A cos (10 t + α) volts and the currents indicated in the circuit are valid. Find the values ​​of R and L.