1. What is a Resistor Voltage Calculator?

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 drops across resistors in circuits.

2. How Does the Calculator Work?

The calculator uses Ohm's Law formula:

Where:

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

Explanation: The voltage across a resistor equals the product of the current flowing through it and its resistance value.

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, you need to consider impedance and phase angles.

Q3: What if my resistor is part of a series/parallel circuit?
A: First calculate the total circuit current or the specific current through your resistor before using this tool.

Q4: How accurate is this calculation?
A: It's theoretically perfect for ideal resistors. Real-world factors like temperature may cause slight variations.

Q5: What units should I use?
A: Use amps for current and ohms for resistance to get volts for the result.