1. What is Ohm's Law?

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

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 the relationship between voltage, current, and resistance in an electrical circuit.

3. Importance of Resistance Calculation

Details: Calculating resistance is crucial for designing electrical circuits, selecting appropriate components, and ensuring safe operation of electrical systems.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: Does this work for AC circuits?
A: This simple form works for DC circuits. For AC circuits, you need to consider impedance which includes resistance, inductance, and capacitance.

Q2: What are typical resistance values?
A: Resistance values vary widely depending on the component, from milliohms in wires to megaohms in insulators.

Q3: How accurate is this calculation?
A: The calculation is mathematically exact, but real-world components may vary due to temperature and other factors.

Q4: Can I calculate power with this?
A: Not directly, but power can be calculated using P = V²/R or P = I²R once you know the resistance.

Q5: What if I get zero or infinite resistance?
A: Zero resistance suggests a short circuit, while infinite resistance suggests an open circuit (no current flow).