Question

Два резистори опорами 15 і 30 Ом з'єднані послідовно. Сила струму в колі дорівнює 0,4 А. Напруга на цій ділянці кола дорівнює:​

Answer 1

Ответ:

Расписал на фото.

Answer 2

Calculation of Voltage in the Circuit

To calculate the voltage in the circuit, we need to use Ohm's law, which states that the voltage (V) is equal to the product of the current (I) and the resistance (R). In this case, the resistors are connected in series, so the total resistance (R_total) is the sum of the individual resistances.

Given: - Resistance of the first resistor (R1) = 15 Ω - Resistance of the second resistor (R2) = 30 Ω - Current in the circuit (I) = 0.4 A

To find the total resistance (R_total), we add the resistances of the two resistors: R_total = R1 + R2 = 15 Ω + 30 Ω = 45 Ω

Now, we can calculate the voltage (V) using Ohm's law: V = I * R_total = 0.4 A * 45 Ω = 18 V

Therefore, the voltage across this section of the circuit is 18 volts.