1. What is Ohm's Law?

Ohm's Law is a fundamental principle in electrical engineering that defines the relationship between voltage (V), current (I), and resistance (R) 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 and inversely proportional to the resistance between them.

2. How Does the Calculator Work?

The calculator uses the Ohm's Law formula wheel:

Where:

• \( V \) — Voltage (volts)
• \( I \) — Current (amps)
• \( R \) — Resistance (ohms)

Explanation: The calculator automatically determines which formula to use based on which two values you provide, then calculates the missing third value.

3. Importance of Ohm's Law

Details: Ohm's Law is essential for designing and analyzing electrical circuits, troubleshooting electrical problems, and understanding how electrical components interact in a system.

4. Using the Calculator

Tips: Enter any two known values (voltage, current, or resistance) and the calculator will compute the missing value. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What if I enter all three values?
A: The calculator will verify if the values satisfy Ohm's Law (V = I × R). If they don't match, it will recalculate based on the first two values entered.

Q2: Can I use this for AC circuits?
A: This calculator is designed for DC circuits. For AC circuits with reactive components, additional calculations for impedance are needed.

Q3: What are typical units for these measurements?
A: Voltage is measured in volts (V), current in amperes (amps, A), and resistance in ohms (Ω).

Q4: Why is Ohm's Law important?
A: It's the foundation of electrical circuit analysis and is used by engineers, electricians, and technicians to design, analyze, and troubleshoot electrical systems.

Q5: Can I calculate power with this?
A: While power (P = V × I) is related to Ohm's Law, this calculator focuses on the core relationship between voltage, current, and resistance.