Parallel Circuit
Also known as: parallel connection, branching circuit
A circuit in which components are connected across the same two points, so each has the same voltage across it. Most practical circuits use parallel connections so devices operate independently.
💡 Intuition
Like a river splitting into branches — the water (current) divides, but the pressure drop (voltage) across each branch is the same.
Core Idea
Same voltage across each branch, but current splits. Total resistance is less than the smallest branch.
Formal View
🔬 Example
🎯 Why It Matters
Most practical circuits use parallel connections so devices operate independently.
⚠️ Common Confusion
Adding more resistors in parallel decreases total resistance and increases total current.
💭 Hint When Stuck
When analysing a parallel circuit, remember that voltage is the same across every branch. First, find the current through each branch using Ohm's law (I = V/R). Then add the branch currents to get the total current. To find total resistance, use 1/R_{\text{total}} = 1/R_1 + 1/R_2 + \ldots
Related Concepts
Prerequisites
Next Steps
How Parallel Circuit Connects to Other Ideas
To understand parallel circuit, you should first be comfortable with circuit, resistance and ohms law. Once you have a solid grasp of parallel circuit, you can move on to circuit diagram and electrical power.
Go Deeper
Frequently Asked Questions
What is Parallel Circuit in Physics?
A circuit in which components are connected across the same two points, so each has the same voltage across it.
Why is Parallel Circuit important?
Most practical circuits use parallel connections so devices operate independently.
What do students usually get wrong about Parallel Circuit?
Adding more resistors in parallel decreases total resistance and increases total current.
What should I learn before Parallel Circuit?
Before studying Parallel Circuit, you should understand: circuit, resistance, ohms law.