Example
Input: 12V, 4Ω
Result: 3 Amps
Step-by-Step Guide
1. Knowns
Enter 2 values.
2. Calc
Find the 3rd.
3. Power
P = V*I.
What is Ohm's Law Calculator?
V = I * R.
How it Works
Relationship between Voltage, Current, and Resistance.
FAQ
What is V?
Voltage (Volts).
What is I?
Current (Amps).
What is R?
Resistance (Ohms).
Wattage?
Power = V * I. Resistors must handle the heat.
LEDs?
Need a resistor to limit current.
Conclusion
Critical for DIY electronics, vaping coil building, and LED wiring to prevent shorts and fires.