1. What is a Voltage Calculator by Ohm's Law?

Definition: This calculator determines the voltage across a resistor using Ohm's Law based on current and resistance values.

Purpose: It helps electrical engineers, technicians, and students quickly calculate voltage in DC circuits.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( V \) — Voltage across resistor (volts)
• \( I \) — Current through resistor (amps)
• \( R \) — Resistance of the component (ohms)

Explanation: The voltage is calculated by multiplying the current flowing through the resistor 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: Does this work for AC circuits?
A: This calculator is for DC circuits. For AC, you need to consider impedance and phase angles.

Q2: What if I know voltage and want to find current?
A: Rearrange the formula: \( I = V / R \). We have a separate current calculator for this purpose.

Q3: What's a typical resistance value?
A: Resistors come in many values, commonly from 1 ohm to several megaohms (1,000,000 ohms).

Q4: How accurate is this calculation?
A: It's mathematically precise for ideal resistors. Real-world factors like temperature may affect actual values.

Q5: Can I calculate power with this?
A: Not directly, but power can be calculated as \( P = V \times I \) using the results from this calculator.