Problem 5-1    Source: Problem elaborated by the autror of the site.

Prove that the resistance seen by the terminals a - b is equal to R in the circuit shown in Figure 05-01.1.

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Problema 5-2    Source:   Adapted of Problem 3.52 - page 61 - NILSSON & RIEDEL - Book: Circuitos Elétricos - 8ª edição - Ed. Pearson - 2010.

Use Delta-Star transformation and compute the resistance between points a - d in the circuit shown in Figure 05-02.1

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Problema 5-3    Source:   Problem 3.54 - page 61 - NILSSON & RIEDEL - Book: Circuitos Elétricos - 8ª edição - Ed. Pearson - 2010.

Use Delta-Star transformation and calculate the equivalent resistance between the points a - b in the circuit shown in Figure 05-03.1

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Problem 5-4    Source:   Problem 2 - page 26 - Handbook Electric Circuits I - Prof. Douglas Schirmer Scharamm - DPEE - UFSM.

It is known that when we apply a voltage V_ab = 90 V to the circuit shown in Figure 05-04.1, the circuit consumes a power equal to 270 W. Find the value of R₂.

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