Question

E=4 В r=1 Ом R=4 Ом I=? U= ?

Answer 1

Ответ:

I= 0,8 A ; U= 3,2 B

Объяснение:

I = E/(r+R) = 4/(1+4) = 4/5 = 0,8 A

U = IR = 0,8*4 = 3,2 B

Answer 2

To find the current (I) and voltage (U) in the given circuit, we can use Ohm's law and the voltage divider rule.

Ohm's law states that the current (I) flowing through a conductor is equal to the voltage (U) across the conductor divided by the resistance (R) of the conductor. Mathematically, it can be written as:

I = U / R

In this case, we are given the voltage (E) and the resistance (r) of the circuit. However, we need to find the current (I) and the voltage (U). So we'll start by finding the voltage across the resistor (U).

Using the voltage divider rule, we can determine the voltage across the resistor (U) as follows:

U = E * (R / (r + R))

Substituting the given values:

U = 4 V * (4 Ω / (1 Ω + 4 Ω)) U = 4 V * (4 Ω / 5 Ω) U ≈ 3.2 V

Now that we have the voltage (U), we can find the current (I) using Ohm's law:

I = U / R

Substituting the values:

I = 3.2 V / 4 Ω I = 0.8 A

Therefore, in the given circuit: Current (I) is approximately 0.8 A. Voltage (U) is approximately 3.2 V.