1. What is Ohm's Law Voltage Calculator?

Definition: This calculator determines the voltage across a resistor using Ohm's Law, which relates voltage, current, and resistance.

Purpose: It helps electrical engineers, technicians, and students calculate voltage in circuits when current and resistance are known.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( V \) — Voltage (volts)
• \( I \) — Current (amps)
• \( R \) — Resistance (ohms)

Explanation: The voltage across a resistor equals the current flowing through it multiplied by its resistance.

3. Importance of Voltage Calculation

Details: Accurate voltage calculations are essential for circuit design, troubleshooting, and ensuring components operate within their specified ranges.

4. Using the Calculator

Tips: Enter the current in amps and resistance in ohms. Both values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What is Ohm's Law?
A: Ohm's Law states that the current through a conductor between two points is directly proportional to the voltage across the two points.

Q2: Can I use this for AC circuits?
A: This calculator works for DC circuits. For AC circuits with reactive components, you'll need to consider impedance.

Q3: What if I know voltage and want to find current?
A: Use the rearranged formula: \( I = V / R \). We have a separate current calculator for this purpose.

Q4: What are typical resistance values?
A: Resistors range from milliohms to megaohms depending on application. Common values are between 100Ω and 100kΩ.

Q5: Does this work for non-ohmic materials?
A: No, Ohm's Law only applies to ohmic materials where resistance remains constant regardless of voltage or current.