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 equation:

Where:

• \( V \) — Voltage (Volts)
• \( I \) — Current (Amperes)
• \( R \) — Resistance (Ohms)

Explanation: The calculator allows you to input any two known values and will calculate the missing third value using the Ohm's Law formula.

3. Importance of Ohm's Law

Details: Ohm's Law is essential for designing and analyzing electrical circuits, troubleshooting electrical problems, and ensuring the proper functioning and safety of electrical systems.

4. Using the Calculator

Tips: Enter any two of the three values (voltage, current, resistance). The calculator will automatically compute the missing value. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What if I provide all three values?
A: The calculator requires exactly two values to calculate the third. If you provide all three, it will verify if they satisfy V = I × R.

Q2: Can I use this for AC circuits?
A: The basic Ohm's Law applies to resistive loads in both DC and AC circuits. For reactive components in AC circuits, impedance calculations are needed.

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

Q4: Does temperature affect resistance?
A: Yes, for most materials, resistance changes with temperature. This calculator assumes constant temperature conditions.

Q5: Can I calculate power with this calculator?
A: While power (P = V × I) is related to Ohm's Law, this calculator specifically focuses on the V = I × R relationship.