Understanding Voltage, Amperage, and Resistance (Ohm's Law)
In electrical circuits, three fundamental quantities are related by Ohm's Law: Voltage (V), Amperage (A), and Resistance (R). Understanding these relationships is crucial for anyone working with electronics or electrical systems.
Voltage (V): Often referred to as electrical potential difference, voltage is the "push" or "pressure" that drives electrical current through a circuit. It's measured in Volts (V). Think of it like the water pressure in a pipe.
Amperage (A): This is the rate of flow of electric charge, commonly known as electric current. It's measured in Amperes (A), or Amps. In our water analogy, this is the volume of water flowing through the pipe per second.
Resistance (R): Resistance is the opposition to the flow of electric current. It's measured in Ohms (Ω). In the water analogy, this would be like the narrowness or obstructions within the pipe that restrict water flow.
Ohm's Law Formula
Ohm's Law states the relationship between these three quantities:
- Voltage = Amperage × Resistance (V = I × R)
- Amperage = Voltage / Resistance (I = V / R)
- Resistance = Voltage / Amperage (R = V / I)
This calculator focuses on helping you calculate Amperage when you know the Voltage and Resistance.
Ohm's Law Calculator (Amperage)
Amperage (A): –