Question

При подключении к источнику тока резистора с электрическим сопротивлением 2 Ом сила тока в электрической цепи равна 3 А. при подключении к источнику тока резистора с электрическим сопротивлением 1 Ом сила тока в электрической цепи равна 4 А. чему равна ЭДС источника тока?

Answer 1

I1=E/(r+R1)---->3=E/(r+2)
I2=E/(r+R2)---->4=E/(r+1)
Решаем систему.
E=12 V
r=2 Om

Answer 2

Calculating the EMF of the Source

When a resistor with an electrical resistance of 2 ohms is connected to the current source, and the current in the electric circuit is 3 amperes, and when a resistor with an electrical resistance of 1 ohm is connected to the current source, and the current in the electric circuit is 4 amperes, we can calculate the electromotive force (EMF) of the current source.

Using the formula for Ohm's law, which states that the current (I) flowing through a conductor between two points is directly proportional to the voltage (V) across the two points, we can calculate the EMF of the source.

The formula for Ohm's law is: V = I * R, where V is the voltage, I is the current, and R is the resistance.

First, let's calculate the voltage when the 2-ohm resistor is connected: - V = I * R - V = 3 A * 2 Ω - V = 6 V

Next, let's calculate the voltage when the 1-ohm resistor is connected: - V = I * R - V = 4 A * 1 Ω - V = 4 V

Therefore, the electromotive force (EMF) of the current source is 6 V when the 2-ohm resistor is connected and 4 V when the 1-ohm resistor is connected.