Question

Сила тока в цепи равна 0,4 А, внутреннее сопротивление источника-0,5Ом, внешнее сопротивление цепи равно 0,4Ом. Определите ЭДС источника тока.

Answer 1

I=E/(R+r); E=I*(R+r);
E=0.4*(0.5+0.4)=0.36 В

Answer 2

Calculation of the EMF of the current source

To determine the electromotive force (EMF) of the current source, we need to consider the total voltage in the circuit. The total voltage is the sum of the voltage across the internal resistance of the source and the voltage across the external resistance of the circuit.

The formula to calculate the total voltage is:

Total Voltage = EMF - (Internal Resistance × Current)

Given the following values: - Current in the circuit (I) = 0.4 A - Internal resistance of the source (Ri) = 0.5 Ω - External resistance of the circuit (Re) = 0.4 Ω

We can substitute these values into the formula to calculate the EMF:

Total Voltage = EMF - (0.5 Ω × 0.4 A) = EMF - 0.2 V

To find the EMF, we need to isolate it in the equation:

EMF = Total Voltage + 0.2 V

Now let's calculate the EMF using the given values.

Calculation:

Total Voltage = EMF - 0.2 V

Since we don't have the value for the total voltage, we cannot calculate the EMF without additional information. Please provide the value of the total voltage or any other relevant information to proceed with the calculation.

If you have any further questions, please let me know.