Question

Имеются лампочки с сопротивлениями R1=2 Ом R2=6 Ом и R3=4.5 Ом первые две соеденены параллельно и третья последовательно с ними на лампе R3 напряжение 18 В начертите схему и определите мощность потребляемую второй лампой

Answer 1

Ответ: 6 Вт, решение во вложенном файле.

Answer 2

Circuit Diagram and Calculation of Power

To determine the power consumed by the second lamp (R2), we need to analyze the given circuit. The first two lamps (R1 and R2) are connected in parallel, and the third lamp (R3) is connected in series with them. The voltage across the third lamp is given as 18 V.

Here is the circuit diagram:

       _______         _______         _______
      |       |       |       |       |       |
      |  R1   |-------|  R2   |-------|  R3   |
      |_______|       |_______|       |_______|

To calculate the power consumed by the second lamp (R2), we can use the formula:

Power (P) = (Voltage (V))^2 / Resistance (R)

Since the voltage across the third lamp (R3) is given as 18 V, we need to find the resistance of the second lamp (R2) to calculate the power consumed.

According to the given information, the resistances of the lamps are as follows: - R1 = 2 Ω - R2 = 6 Ω - R3 = 4.5 Ω

To find the resistance of the second lamp (R2), we can subtract the resistance of the first lamp (R1) and the third lamp (R3) from the total resistance of the circuit.

Total resistance (R_total) = R1 + R2 + R3

Substituting the given values: R_total = 2 Ω + 6 Ω + 4.5 Ω = 12.5 Ω

Now, we can find the resistance of the second lamp (R2): R2 = R_total - R1 - R3 = 12.5 Ω - 2 Ω - 4.5 Ω = 6 Ω

Using the formula for power, we can calculate the power consumed by the second lamp (R2):

Power (P) = (Voltage (V))^2 / Resistance (R)

Substituting the given values: P = (18 V)^2 / 6 Ω = 54 W

Therefore, the power consumed by the second lamp (R2) is 54 Watts.

Please note that the calculations are based on the given information and assumptions made about the circuit.