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Circuit Basics

Learn the fundamentals of electrical circuits through simple explanations and interactive tools

Beginner Friendly
🔋Fundamental Concepts
Understanding the basic building blocks of electrical circuits
Voltage (V)
Volts (V)
The electrical pressure that pushes current through a circuit

Example:

A 9V battery provides 9 volts of electrical pressure

Think of it like:

Like water pressure in a pipe - higher voltage = stronger push

Current (I)
Amperes (A)
The flow of electrical charge through a conductor

Example:

A small LED might use 0.02 amperes (20 milliamps)

Think of it like:

Like water flow rate - how much electricity flows per second

Resistance (R)
Ohms (Ω)
Opposition to the flow of current in a circuit

Example:

A typical resistor might be 330 ohms

Think of it like:

Like a narrow pipe restricting water flow

Power (P)
Watts (W)
The rate at which electrical energy is consumed

Example:

A bright LED might consume 3 watts of power

Think of it like:

Like the speed of energy consumption

Ohm's Law
The most important relationship in electronics
V = I × R

Voltage equals Current times Resistance

If you know:
Current & Resistance
You can find:
Voltage
Formula:
V = I × R