Physical arrangement of resistors, Physics

Physical arrangement of resistors:

Before we look at some problems it is necessary to warn you that physical appearances can be deceptive. When components are mounted they are usually done so in a manner as to reduce the space they occupy to a minimum. Care must be taken to decide whether they are mounted in series or parallel or in a combination of both.

2409_physical arrangement of resistors.png

Thus on the Tag Board above, the resistors may appear to be in parallel, however, only R3 and R4 are in parallel.

SOLUTION OF RESISTOR NETWORKS USING OHM'S LAW

Many problems may be solved by combining series and parallel groups of resistors and applying Ohm's law. Remember that Ohm's law involves three quantities - I, V and R, thus to find any one quantity the other two must be known or be capable of determination. Where resistors appear in both series and parallel they may be reduced to a single effective resistance using a step-by-step sequence as follows.

• Combine any simple series groupings within branches ( R = R1 + R2 + --- ).
2300_physical arrangement of resistors1.png 
• Replace any simple parallel groups by single equivalent resistors  575_physical arrangement of resistors2.png 

2090_physical arrangement of resistors3.png 
• Combine any simple series groupings ( R = R1 + R2 + --- ). 

2269_physical arrangement of resistors4.png 
• Replace any simple parallel groups.
2283_physical arrangement of resistors5.png

• Determine the single equivalent resistance.

70_physical arrangement of resistors6.png

At this point the total circuit current (Is) may be found if Vs is given, or Vs found if Is is given. Having determined Vs or Is, as appropriate, the current in any branch and the voltage drop across any resistor can be found by working backwards through the sequence in the first paragraph of this section, applying Ohm's law at each stage.

 

Posted Date: 9/13/2012 3:40:55 AM | Location : United States







Related Discussions:- Physical arrangement of resistors, Assignment Help, Ask Question on Physical arrangement of resistors, Get Answer, Expert's Help, Physical arrangement of resistors Discussions

Write discussion on Physical arrangement of resistors
Your posts are moderated
Related Questions
A circular coil has a 12.8cm radius and consists of 29.0 closely wound turns of wire. An externally produced magnetic field of magnitude 2.23 mT is perpendicular to the coil. (a) i

a. Consider an x-ray machine with a step-up transformer consisting of a primary coil of 100 turns and a secondary one with 50000 turns. If the voltage applied across the primary co

What is the stimulated emission? Define this term briefly. Stimulated emission: a. While photon interacts along with atom that is in the excited state E 2 , in that case de-

The resistances of commercially-available discrete resistors are restricted to particular sets. For example, the available values of resistors with 10% tolerance are selections fro

Give the theory of plane diffraction grating for normal incidence.

Can anyone give me a clear picture of GRAVITY?How does it works and and where does it pulls everthing?



a jet of engine on a test tube takes in 20kg of air per second at a velocity of 100m/s and burns 0.8kg of fuel per second.after compression and heating the exhaut gases are ejected