Basic Circuits - Equivalent Resistance

Click For Summary
SUMMARY

The discussion focuses on calculating equivalent resistance between terminals B-C and B-D in a circuit with two 80-ohm resistors. The conclusion states that the resistors are in parallel for terminals A-B, resulting in an equivalent resistance of 90 ohms for B-C and 85 ohms for B-D. The reasoning is that the configuration of resistors can change based on the path taken, specifically noting that a wire with 0 ohms creates a short circuit around the resistors in the paths B-C and B-D.

PREREQUISITES
  • Understanding of Ohm's Law
  • Knowledge of series and parallel resistor configurations
  • Familiarity with circuit analysis techniques
  • Basic concepts of equivalent resistance
NEXT STEPS
  • Study the principles of series and parallel circuits in detail
  • Learn how to calculate equivalent resistance in complex circuits
  • Explore circuit simulation tools like LTspice for practical applications
  • Investigate the impact of short circuits on circuit behavior
USEFUL FOR

Students studying electrical engineering, hobbyists building circuits, and anyone looking to deepen their understanding of circuit analysis and equivalent resistance calculations.

subwaybusker
Messages
47
Reaction score
0

Homework Statement


circ.jpg



Find the Resistance between terminals B-C, B-D

Homework Equations





The Attempt at a Solution



The book says that the 2 80-ohm resistors are in parallel for terminals A-B, and the answer for B-C=90ohms, B-D=85ohms. I don't quite understand why this is. Is it because the 2 80ohm resistors are in series between terminals B-C and B-D, and therefore it short circuits because the other path (wire only) is 0 ohms? Does this mean that whether the resistors are in series or parallel depends on the path taken?
 
Physics news on Phys.org
Correct about the short circuit around the 80 Ohm resistors for the path B-C and B-D.
 

Similar threads

How to find the equivalent resistance of this electric circuit?
  • · Replies 5 ·
Replies
5
Views
4K
Engineering Black box which contains 5x 1ohm resistors
  • · Replies 3 ·
Replies
3
Views
3K
Engineering Find the equivalent Resistance of the circuit
  • · Replies 14 ·
Replies
14
Views
6K
Circuit design using switches puzzle
  • · Replies 13 ·
Replies
13
Views
3K
Equivalent resistance with a capacitor
  • · Replies 11 ·
Replies
11
Views
8K
Analyze this circuit with 2 sources and 4 resistors
  • · Replies 37 ·
2
Replies
37
Views
6K
I finding the Thevenin equivalent resistance
  • · Replies 6 ·
Replies
6
Views
2K
Engineering Find the Thevenin equivalent circuit
  • · Replies 42 ·
2
Replies
42
Views
7K
Engineering How to solve a circuit mystery box?
  • · Replies 16 ·
Replies
16
Views
4K
Find the Norton equivalent resistance
  • · Replies 2 ·
Replies
2
Views
2K