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 formula:

Where:

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

Explanation: The formula calculates the resistance value when voltage and current are known. This is essential for circuit design and analysis.

3. Importance of Resistance Calculation

Details: Accurate resistance calculation is crucial for designing electronic circuits, selecting appropriate components, troubleshooting electrical systems, and ensuring proper circuit operation and safety.

4. Using the Calculator

Tips: Enter voltage in volts and current in amperes. Both values must be positive numbers greater than zero. The calculator will compute the resistance in ohms.

5. Frequently Asked Questions (FAQ)

Q1: What is the unit of resistance?
A: Resistance is measured in ohms (Ω), named after German physicist Georg Simon Ohm.

Q2: Can I use this calculator for AC circuits?
A: This calculator is designed for DC circuits. For AC circuits, impedance calculations considering reactance are required.

Q3: What are typical resistance values in circuits?
A: Resistance values range from milliohms (mΩ) in conductors to megaohms (MΩ) in insulators, depending on the application.

Q4: How does temperature affect resistance?
A: For most conductors, resistance increases with temperature. The temperature coefficient of resistance varies by material.

Q5: What is the power relationship in Ohm's Law?
A: Power (P) can be calculated as P = V × I, or using resistance: P = I² × R or P = V² / R.