1. What is Ohm's Law?

Ohm's Law is a fundamental principle in electrical engineering that describes the relationship between voltage, current, and resistance in an electrical circuit. It states that the current through a conductor between two points is directly proportional to the voltage across the two points.

2. How Does the Calculator Work?

The calculator uses Ohm's Law equation:

Where:

• \( R \) — Resistance in ohms (Ω)
• \( V \) — Voltage in volts (V)
• \( I \) — Current in amperes (A)

Explanation: The equation shows that resistance is equal to voltage divided by current. This relationship forms the basis for analyzing electrical circuits.

3. Importance of Resistance Calculation

Details: Calculating resistance is essential for circuit design, troubleshooting electrical systems, selecting appropriate components, and ensuring electrical safety in various applications.

4. Using the Calculator

Tips: Enter voltage in volts and current in amperes. Both values must be positive numbers greater than zero for accurate calculation.

5. Frequently Asked Questions (FAQ)

Q1: What are the units for resistance calculation?
A: Resistance is measured in ohms (Ω), voltage in volts (V), and current in amperes (A).

Q2: Does Ohm's Law apply to all materials?
A: Ohm's Law applies to ohmic materials where resistance remains constant regardless of voltage. Some materials like semiconductors are non-ohmic.

Q3: What is the typical resistance range for common components?
A: Resistors typically range from less than 1 ohm to several megaohms, depending on the application and component type.

Q4: How does temperature affect resistance?
A: For most conductors, resistance increases with temperature, while for semiconductors, resistance generally decreases with temperature.

Q5: Can I use this calculator for AC circuits?
A: This calculator uses the DC form of Ohm's Law. For AC circuits with reactive components, impedance calculations are more appropriate.