Question

Помагите пожалуйста очень нужно, срочно пожааааааааалуйста. ......((((((((( Участок цепи состоит из трех последовательно соединенных сопротивлений R1=20,R2=25,R3=30. Начертите схему этого участка и определите напряжение на концах каждого из сопротивлений, если известно, что к концам всего участка приложено напряжение 150В.

Answer 1

U = 150 В
R1 = 20 Ом
R2 = 25 Ом
R3 = 30 Ом

U1,U2,U3 - ?

На всех участках сила тока одинаковая по некоторым вещам, которые ты должен знать.

I = I1 = I2 = I3 

R = 75 Ом

I = 2A ( U/R, где R - общее сопротивление R = R1+R2+R3)

2 = U1/R1
U1 = 2*R1 = 40 В
 
2 = U2/R2  
U2 = 2*R2 = 50 В

2 = U3/R3
U3 = 2*R3 = 60 В

Answer 2

Circuit Diagram and Voltage Calculation

To solve this problem, we need to draw the circuit diagram and calculate the voltage across each resistor.

The circuit consists of three resistors connected in series: R1 = 20Ω, R2 = 25Ω, and R3 = 30Ω. The total voltage applied to the circuit is 150V.

To find the voltage across each resistor, we can use Ohm's Law, which states that the voltage across a resistor is equal to the current flowing through it multiplied by its resistance.

Let's calculate the voltage across each resistor step by step:

1. Calculate the total resistance of the circuit (R_total) by summing up the resistances of the individual resistors: R_total = R1 + R2 + R3 = 20Ω + 25Ω + 30Ω = 75Ω.

2. Calculate the current flowing through the circuit (I) using Ohm's Law: I = V_total / R_total, where V_total is the total voltage applied to the circuit. In this case, V_total = 150V. Therefore, I = 150V / 75Ω = 2A.

3. Calculate the voltage across each resistor using Ohm's Law: - Voltage across R1 (V1) = I * R1 = 2A * 20Ω = 40V. - Voltage across R2 (V2) = I * R2 = 2A * 25Ω = 50V. - Voltage across R3 (V3) = I * R3 = 2A * 30Ω = 60V.

Therefore, the voltage across each resistor is as follows: - Voltage across R1 (V1) = 40V. - Voltage across R2 (V2) = 50V. - Voltage across R3 (V3) = 60V.

Here is the circuit diagram:

   ---[R1 = 20Ω]---[R2 = 25Ω]---[R3 = 30Ω]---
   |                                      |
   |                                      |
   ----------------------------------------

I hope this helps! Let me know if you have any further questions.