Math Problem Statement

Find the total resistance (RT) of the circuit with the following resistors: R1 = 50.092 Ω, R2 = 1.072 kΩ, R3 = 560 Ω, R4 = 25 Ω, R5 = 13 Ω. The circuit is powered by a 40V source.

Solution

The circuit in the image shows resistors connected in both series and parallel, with the goal to find the total resistance (RTR_T).

Resistors in the Circuit:

  • R1=50.092ΩR_1 = 50.092 \, \Omega
  • R2=1.072kΩ=1072ΩR_2 = 1.072 \, \text{k}\Omega = 1072 \, \Omega
  • R3=560ΩR_3 = 560 \, \Omega
  • R4=25ΩR_4 = 25 \, \Omega
  • R5=13ΩR_5 = 13 \, \Omega

Steps to solve for total resistance:

  1. Combine the resistances in series: Resistors R4R_4 and R5R_5 are in series, so: R45=R4+R5=25Ω+13Ω=38ΩR_{\text{45}} = R_4 + R_5 = 25 \, \Omega + 13 \, \Omega = 38 \, \Omega

  2. Combine resistances in parallel: R3R_3 and R45R_{\text{45}} are in parallel. The formula for two resistors in parallel is: 1R345=1R3+1R45\frac{1}{R_{\text{345}}} = \frac{1}{R_3} + \frac{1}{R_{\text{45}}} Substituting values: 1R345=1560Ω+138Ω\frac{1}{R_{\text{345}}} = \frac{1}{560 \, \Omega} + \frac{1}{38 \, \Omega} Calculating this will give R345R_{\text{345}}.

  3. Combine the remaining series resistances: The resistors R1R_1, R2R_2, and R345R_{\text{345}} are in series. The total resistance will be: RT=R1+R2+R345R_T = R_1 + R_2 + R_{\text{345}}

I'll calculate the exact total resistance next.The total resistance RTR_T of the circuit is approximately 1157.68Ω1157.68 \, \Omega.

Would you like a more detailed explanation of any step, or do you have any additional questions?

Here are 5 related questions to expand your understanding:

  1. How do you calculate the equivalent resistance for more than two resistors in parallel?
  2. What effect does a parallel resistor have on the total resistance?
  3. How would the total resistance change if you replaced R1R_1 with a larger resistor?
  4. Can you derive the formula for resistors in parallel from Ohm’s law?
  5. How can you use the total resistance to calculate current in the circuit if the voltage is known?

Tip: When dealing with resistors in parallel, the total resistance is always less than the smallest individual resistance in the parallel group.

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Math Problem Analysis

Mathematical Concepts

Series and parallel circuits
Ohm's law
Equivalent resistance

Formulas

R_total (series) = R1 + R2 + ...
1/R_total (parallel) = 1/R1 + 1/R2 + ...

Theorems

Ohm’s Law
Kirchhoff's Voltage Law

Suitable Grade Level

Grades 10-12