Question

R1=2омR2 =3омR3=4омI2=1AI общ=3Aнайти U общ.​

Answer 1

R=R1+R2+R3

I=U/R =} U=IR

(I2 лишнее значение, нужное для проверки знаний и внимания ученика, ведь общее значение у нас есть)

Подставим данные

R= 2 Ом + 3 Ом + 4 Ом = 9 Ом

U = 3А × 9 Ом = 27 В

Answer 2

To find the total voltage (U общ), we can use Ohm's law, which states that voltage (V) is equal to the current (I) multiplied by the resistance (R):

V = I * R

First, let's calculate the voltage drop across each resistor using Ohm's law:

1. Voltage across R1: V1 = I2 * R1 = 1A * 2Ω = 2V

2. Voltage across R2: V2 = I2 * R2 = 1A * 3Ω = 3V

3. Voltage across R3: V3 = I2 * R3 = 1A * 4Ω = 4V

Next, to find the total voltage (U общ), we need to add up the voltage drops across all the resistors in series:

U общ = V1 + V2 + V3 U общ = 2V + 3V + 4V U общ = 9V

Therefore, the total voltage across the resistors is 9 volts (U общ = 9V).