1. What is Ohm's Law?

Ohm's Law is a fundamental principle in electrical engineering that describes 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 (Ω)
• \( V \) — Voltage (V)
• \( I \) — Current (A)

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, and ensuring proper component selection in electronic devices.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: What are the units used in Ohm's Law?
A: Resistance is measured in ohms (Ω), voltage in volts (V), and current in amperes (A).

Q2: Can Ohm's Law be used for AC circuits?
A: Ohm's Law applies to both DC circuits and AC circuits with resistive loads. For reactive components, impedance calculations are needed.

Q3: What is the relationship between power and Ohm's Law?
A: Power (P) can be calculated as P = V×I, or using variations that incorporate resistance: P = I²×R or P = V²/R.

Q4: Are there limitations to Ohm's Law?
A: Ohm's Law applies to ohmic materials where resistance remains constant. It doesn't apply to non-ohmic materials like diodes and transistors.

Q5: How accurate is this calculator?
A: The calculator provides precise results based on the input values, assuming ideal conditions and ohmic behavior.