Question

Источник постоянного тока замкнут на внешнее сопротивление, внутреннее сопротивление источника составляет пятую часть от внешнего сопротивления, определить КПД схемы и дать ответ в процентах

Answer 1

Calculation of Efficiency of a Circuit with a Constant Current Source

To determine the efficiency of a circuit with a constant current source, we need to consider the external resistance and the internal resistance of the source. According to the given information, the internal resistance of the source is one-fifth (1/5) of the external resistance.

The efficiency (η) of a circuit can be calculated using the formula:

η = (P_out / P_in) * 100%

Where: - η is the efficiency of the circuit, - P_out is the power output of the circuit, and - P_in is the power input to the circuit.

In this case, since we have a constant current source, we can assume that the power input (P_in) is equal to the power output (P_out). Therefore, the efficiency can be simplified to:

η = (P_out / P_out) * 100% = 100%

So, the efficiency of the circuit is 100%.

Please note that the given information does not provide specific values for the external resistance or the current flowing through the circuit. Therefore, the calculation is based on the assumption that the power input and power output are equal.