Problem 7.1   Source:   Problem elaborated by the author of the site.

Calculate the eletric power dissipated by the load R_L, in the circuit shown in Figure 07-01.1, when it assumes the following values: 1, 5, 10, 15, 25, 50 and 60 ohms, and tell what value of R_L dissipates the greatest eletric power.

Problem solving:   click here!

Problem 7.2   Source:   Problem elaborated by the author of the site.

Knowing that the power dissipated by resistor of 12 ohms is of 12 watts in the circuit shown in Figure 07-02.1, calculate the possible values ​​of the voltage source V and the currents of the circuit.

Problem solving:   click here!

Problem 7.3   Source:   Problem elaborated by the author of the site.

For the circuit shown in the Figure 07-03.1, the potentiometer P1 varies its resistance from 0 to 50Ω. Make a graph showing the eletric power dissipated in the resistor R1 when we vary the potentiometer throughout its range.

Problem solving:   click here!

Problem 7.4   Source:   Problem elaborated by the author of the site.

Repeat the previous problem by calculating the eletric power dissipated in the potentiometer P₁.

Problem solving:   click here!