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 (Amperes)

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 (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 are the units of measurement?
A: Resistance is measured in Ohms (Ω), voltage in Volts (V), and current in Amperes (A).

Q2: Does Ohm's Law apply to all materials?
A: Ohm's Law applies to ohmic materials where resistance remains constant regardless of voltage and current. Some materials like semiconductors are non-ohmic.

Q3: What is the relationship between the three quantities?
A: Resistance is directly proportional to voltage and inversely proportional to current in a circuit.

Q4: Can I calculate voltage or current using this formula?
A: Yes, the formula can be rearranged to calculate voltage (V = I × R) or current (I = V / R).

Q5: 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 application.