1. What is Ohm's Law?

Ohm's Law is a fundamental principle in electrical engineering that defines the relationship between voltage, current, and resistance 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.

2. How Does the Calculator Work?

The calculator uses Ohm's Law equation:

Where:

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

Explanation: The equation calculates electrical resistance by dividing voltage by current in a circuit.

3. Importance of Resistance Calculation

Details: Accurate resistance calculation is crucial for circuit design, troubleshooting electrical systems, selecting appropriate components, and ensuring electrical safety in various applications.

4. Using the Calculator

Tips: Enter voltage in volts and current in amps. Both values must be positive numbers greater than zero for accurate calculation.

5. Frequently Asked Questions (FAQ)

Q1: What is the unit of measurement for resistance?
A: Resistance is measured in ohms (Ω), named after German physicist Georg Ohm.

Q2: Can I use this calculator for AC circuits?
A: This calculator uses the basic DC version of Ohm's Law. For AC circuits, impedance calculations require additional factors like frequency and phase angle.

Q3: What are typical resistance values in electronic circuits?
A: Resistance values can range from milliohms (mΩ) in conductors to megaohms (MΩ) in insulators, depending on the application and materials used.

Q4: Does temperature affect resistance?
A: Yes, for most materials, resistance increases with temperature. The relationship is described by the temperature coefficient of resistance.

Q5: What if I get zero or infinite resistance?
A: Zero resistance indicates a short circuit, while infinite resistance suggests an open circuit or broken connection in the circuit.