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.

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 fundamental in circuit design, troubleshooting electrical systems, and ensuring proper component selection.

4. Using the Calculator

Tips: Enter voltage in volts and current in amperes. Both values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What if I get zero resistance?
A: Zero resistance would require infinite current, which is impossible in real circuits. Check your input values.

Q2: Does this work for AC circuits?
A: This calculates DC resistance. For AC circuits, you need to consider impedance which includes reactance.

Q3: What are typical resistance values?
A: Resistance values vary widely from milliohms in conductors to megaohms in insulators.

Q4: Can I calculate power with this?
A: Not directly, but power (P) can be calculated as P = V × I or P = I² × R once you have resistance.

Q5: Why does resistance matter?
A: Resistance determines how much current flows for a given voltage, affecting circuit performance and heat generation.