Understand Ohm's Law: Proportional Relationship Explained

  • Thread starter Thread starter Mrod777
  • Start date Start date
  • Tags Tags
    Law Ohm's law
Click For Summary
SUMMARY

Ohm's Law defines the relationship between voltage (V), current (I), and resistance (R) in an electrical circuit, expressed by the equation I = V/R. This law establishes that current is directly proportional to voltage and inversely proportional to resistance. As voltage increases, current increases, while an increase in resistance results in a decrease in current. This fundamental principle is essential for understanding electrical circuits and their behavior.

PREREQUISITES
  • Understanding of basic electrical concepts such as voltage, current, and resistance.
  • Familiarity with mathematical relationships and proportions.
  • Knowledge of electrical circuit components.
  • Basic grasp of electrical safety and measurements.
NEXT STEPS
  • Study the applications of Ohm's Law in circuit design.
  • Learn about Kirchhoff's Laws for analyzing complex circuits.
  • Explore the use of multimeters for measuring voltage, current, and resistance.
  • Investigate the impact of temperature on resistance in conductors.
USEFUL FOR

Electrical engineering students, hobbyists working on electronics projects, and anyone seeking to deepen their understanding of electrical circuit behavior.

Mrod777
Messages
5
Reaction score
0
Ohm's law states that, in an electrical circuit, the current passing through a conductor between two points is directly proportional to the potential difference (i.e. voltage drop or voltage) across the two points, and inversely proportional to the resistance between them. The mathematical equation that describes this relationship is:

I = V/R
I realize this may be a basic question in electronics however I am looking at it in a new perspective, that of proportions.

Can someone please aide me in comprehending what is defined as (proportional) in this Law.
thanks
 
Physics news on Phys.org
The law was formulated as V across two points is directly proportional to the current I. The constant of proportionality was called the resistance R.
 
"Direct proportion" means that as one variable increases, the other increases (more voltage = more current).

"Indirect proportion" means that as one variable increases, the other decreases (more resistance = less current).
 
Thanks Noein your anwser explains what I wanted to know
 

Similar threads

Ohm's Law - Finding Source Voltage
  • · Replies 3 ·
Replies
3
Views
2K
Two concentric conducting spherical shells and resistor in between
  • · Replies 44 ·
2
Replies
44
Views
4K
Ohm's law and Kirchoff — What am I missing?
  • · Replies 4 ·
Replies
4
Views
2K
Connection between V vs I graphs and Ohm's Law
  • · Replies 7 ·
Replies
7
Views
6K
Understanding example in Wikipedia entry for open circuit voltage
  • · Replies 3 ·
Replies
3
Views
2K
Undergrad Resistance and specific resistance relationships
  • · Replies 16 ·
Replies
16
Views
2K
Explain the connection between Potential Difference, Current & Ohm's Law
  • · Replies 8 ·
Replies
8
Views
4K
Undergrad Does Ohm's Law work for Light Bulbs?
  • · Replies 57 ·
2
Replies
57
Views
13K
Kirchhoff's and Ohm's law circuit diagram issue.
  • · Replies 6 ·
Replies
6
Views
3K
Is voltage the same in parallel circuits with different resistance values?
  • · Replies 2 ·
Replies
2
Views
6K