Задача 30710.

Determine the voltage at the terminals of the power source if it provides a current of 2 A in the circuit. The circuit consists of two parallel-connected light bulbs with a power of 30 W each. Power losses in the supply wires amount to 10 useful power.

Detailed solution with a brief record of the conditions, formulas and laws used in the solution, derivation of the calculation formula and answer.
If you have any questions regarding the solution, please write. I try to help.