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. The formula is expressed as R = V/I.

2. How Does the Calculator Work?

The calculator uses Ohm's Law equation:

Where:

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

Explanation: The equation shows that resistance is equal to the voltage divided by the current flowing through a circuit.

3. Importance of Resistance Calculation

Details: Calculating resistance is fundamental in electrical engineering and electronics for designing circuits, selecting appropriate components, and troubleshooting electrical systems.

4. Using the Calculator

Tips: Enter voltage in volts (V) and current in amperes (A). Both values must be positive numbers greater than zero for accurate calculation.

5. Frequently Asked Questions (FAQ)

Q1: What is the unit of resistance?
A: The unit of resistance is the Ohm, represented by the symbol Ω.

Q2: Can resistance be negative?
A: In standard electrical components, resistance is always positive. Some specialized components may exhibit negative resistance under certain conditions.

Q3: How does temperature affect resistance?
A: For most conductors, resistance increases with temperature. For semiconductors, resistance typically decreases with temperature.

Q4: What are typical resistance values in circuits?
A: Resistance values can range from milliohms (mΩ) in conductors to megaohms (MΩ) in insulators, depending on the material and application.

Q5: Can I use this calculator for AC circuits?
A: This calculator uses the DC version of Ohm's Law. For AC circuits with reactive components, impedance calculations are more appropriate.