Tips for analyzing a combination circuit


by shemer77
Tags: analyzing, circuit, combination, tips
shemer77
shemer77 is offline
#1
Mar7-09, 10:37 AM
P: 97
1. The problem statement, all variables and given/known data
So this Monday I will have a test, and I know for a fact that one of the free response questions will be a circuit with a combination of series and parallel resistors.So my question is can you guys give me some tips on how to do these successfully. I know that I need to start from the farthest resistor. In parallel the voltage is the same, and throughout the circuit the voltage is the same for the series ones. Any more things I need to now? also I don't understand really when there are 2 batteries in the circuit.
Phys.Org News Partner Science news on Phys.org
Going nuts? Turkey looks to pistachios to heat new eco-city
Space-tested fluid flow concept advances infectious disease diagnoses
SpaceX launches supplies to space station (Update)
Astronuc
Astronuc is offline
#2
Mar7-09, 10:47 AM
Admin
Astronuc's Avatar
P: 21,634
One tries to simply the resistances into equivalent resistances.

Parallel components share the same voltage (potential) since they share common nodes, but series resistances have the same current, and the voltage drop would be the same only if the resistances are the same.

A battery raises the potential from - terminal to + terminal when the current i is oriented from - to +, and lowers the potential when the current i is oriented against + to - terminal.

i.e. if i -> then - || + raises potential, and lowers it if the battery is oriented + || -
mikelepore
mikelepore is offline
#3
Mar7-09, 12:50 PM
P: 567
In cases where all resistances can be simplified to series and parallel, it's sometimes helpful for a beginner to write the combination in words, then look at the picture again to verify it. A person might write something like:

[ (R1 series R2) parallel (R3 series R4) parallel R5 ] series R6

... then check it by another look at the diagram. If it still looks right, proceed with the calculations.


Register to reply

Related Discussions
need help with analyzing this combination circuity Introductory Physics Homework 13
How To Implement A "combination Circuit" Using .. Other Science Learning Materials 1
Resistance problem- combination circuit Introductory Physics Homework 4
Finding the total resistance-combination circuit Introductory Physics Homework 0
combination circuit help please Introductory Physics Homework 4