Question

In a circuit shown in Fig. 3.54 resistances R₁ and R₂ are known, as well as emf's (ℰ₁) and emf(ℰ₂). The internal resistances of the sources are negligible. At what value of the resistance R will the thermal power generated in it be the highest? What is it equal to?

Answer 1

Indicate the currents in the circuit as shown in the figure. Applying loop rule in the closed loop 12561, - Δφ = 0 we get

So, thermal power, generated in the resistance R,