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 formula:

Where:

• \( R \) — Resistance (Ω)
• \( V \) — Voltage (V)
• \( I \) — Current (A)

Explanation: The formula calculates electrical resistance by dividing voltage by current. This relationship forms the basis for analyzing electrical circuits.

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 for resistance calculation?
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 (diodes, transistors) are non-ohmic.

Q3: What is the relationship between the three variables?
A: Resistance is directly proportional to voltage and inversely proportional to current. Higher voltage with constant current means higher resistance.

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

Q5: What are typical resistance values in circuits?
A: Resistance values vary widely from milliohms (mΩ) in conductors to megaohms (MΩ) in insulators, depending on the application and materials used.