Ohm's Law
Also known as: V=IR, voltage-current relationship
The relationship stating that voltage across a conductor equals the current through it multiplied by its resistance. Ohm's law is the most-used equation in circuit analysis and electrical engineering.
💡 Intuition
More push (voltage) means more flow (current). More resistance means less flow for the same push.
Core Idea
Voltage, current, and resistance are linked — knowing any two lets you calculate the third.
🔬 Example
🎯 Why It Matters
Ohm's law is the most-used equation in circuit analysis and electrical engineering.
⚠️ Common Confusion
Ohm's law applies to individual components, not always to the whole circuit at once.
Related Concepts
Prerequisites
How Ohm's Law Connects to Other Ideas
To understand ohm's law, you should first be comfortable with voltage, resistance and electric current. Once you have a solid grasp of ohm's law, you can move on to series circuit, parallel circuit and electrical power.
Go Deeper
Frequently Asked Questions
What is Ohm's Law in Physics?
The relationship stating that voltage across a conductor equals the current through it multiplied by its resistance.
Why is Ohm's Law important?
Ohm's law is the most-used equation in circuit analysis and electrical engineering.
What do students usually get wrong about Ohm's Law?
Ohm's law applies to individual components, not always to the whole circuit at once.
What should I learn before Ohm's Law?
Before studying Ohm's Law, you should understand: voltage, resistance, electric current.