Ohm's Law Calculator
Calculate voltage, current, or resistance using Ohm's Law.
Ohm's Law Converter
Understanding Ohm's Law
Ohm's Law is a fundamental principle in electronics that describes the relationship between voltage, current, and resistance in an electrical circuit. It states that the current flowing through a conductor between two points is directly proportional to the voltage across the two points, and inversely proportional to the resistance between them.
Ohm's Law Formulas
Voltage (V): V = I × R
Current (I): I = V / R
Resistance (R): R = V / I
Where:
• V = Voltage in Volts (V)
• I = Current in Amperes (A)
• R = Resistance in Ohms (Ω)
Current (I): I = V / R
Resistance (R): R = V / I
Where:
• V = Voltage in Volts (V)
• I = Current in Amperes (A)
• R = Resistance in Ohms (Ω)
Key Concepts
- Voltage (V): The electrical potential difference between two points.
- Current (I): The flow of electric charge.
- Resistance (R): The opposition to the flow of electric current.
Common Applications of Ohm's Law
| Application | Description |
|---|---|
| Circuit Design | Determining appropriate resistor values for LEDs or other components. |
| Troubleshooting | Identifying faults in circuits by measuring voltage, current, or resistance. |
| Power Calculation | Used in conjunction with power formulas (P = V × I) to determine power dissipation. |
| Component Sizing | Selecting components that can handle the expected voltage and current. |
Frequently Asked Questions
Who discovered Ohm's Law?
Ohm's Law was formulated by German physicist Georg Simon Ohm and published in 1827.
Can Ohm's Law be applied to AC circuits?
Ohm's Law can be applied to AC circuits, but resistance is replaced by impedance (Z), which accounts for resistance, capacitance, and inductance. The formula becomes V = I × Z.