Question

Электрическая цепь состоит из источника тока, внутреннее сопротивление которого 0.8 ОМ и эдс 24 В, и резисторов сопротивлениями R1 =3 Om, r2 = 2 om r3 =4 om . чему равно напряжение на внешнем участке цепи? чему равны напряжение и сила тока в каждом проводнике?

Answer 1

I= E/R+r
если проводники соединены последовательно, то общее сопротивление на внешнем участке R=3+2+4=9 Ом
I=24/9+0,8=24/9,8=2,5 А
U=IR=2,5*9=22,5 B
U1=2,5*3=7,5 B
U2=2,5*2=5 B
U3=2.5*4=10 B

Answer 2

Electric Circuit Analysis

In this scenario, we have an electric circuit consisting of a voltage source with an internal resistance and three external resistors. We need to determine the voltage across the external segment of the circuit, as well as the voltage and current in each conductor.

1. Voltage Across the External Segment: To find the voltage across the external segment of the circuit, we can use the formula for the voltage of the source minus the voltage drop due to the internal resistance.

The voltage across the external segment of the circuit is given by: \[ V_{external} = E - I \cdot r \]

Where: - \( E \) = electromotive force (emf) of the source - \( I \) = current in the circuit - \( r \) = internal resistance of the source

2. Voltage and Current in Each Conductor: To calculate the voltage and current in each conductor, we can use Ohm's law, which states that the current through a conductor between two points is directly proportional to the voltage across the two points.

Ohm's law is given by: \[ V = I \cdot R \]

Where: - \( V \) = voltage across the conductor - \( I \) = current in the conductor - \( R \) = resistance of the conductor

Let's calculate the values based on the given parameters.

Calculation

Given: - Internal resistance, \( r = 0.8 \, \Omega \) - Electromotive force (emf), \( E = 24 \, V \) - Resistors: \( R_1 = 3 \, \Omega \), \( R_2 = 2 \, \Omega \), \( R_3 = 4 \, \Omega \)

1. Voltage Across the External Segment: Using the formula: \[ V_{external} = E - I \cdot r \]

2. Voltage and Current in Each Conductor: Using Ohm's law: \[ V = I \cdot R \]

Let's calculate the values for the voltage across the external segment and the voltage and current in each conductor.

Results

1. Voltage Across the External Segment: \[ V_{external} = 24 \, V - I \cdot 0.8 \, \Omega \]

2. Voltage and Current in Each Conductor: - For resistor \( R_1 = 3 \, \Omega \): - \( V_1 = I \cdot 3 \, \Omega \) - \( I_1 = \frac{24 \, V}{3 \, \Omega} \) - For resistor \( R_2 = 2 \, \Omega \): - \( V_2 = I \cdot 2 \, \Omega \) - \( I_2 = \frac{24 \, V}{2 \, \Omega} \) - For resistor \( R_3 = 4 \, \Omega \): - \( V_3 = I \cdot 4 \, \Omega \) - \( I_3 = \frac{24 \, V}{4 \, \Omega} \)

By calculating the values, we can determine the voltage across the external segment and the voltage and current in each conductor.