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 and inversely proportional to the resistance between them.

2. How Does the Calculator Work?

The calculator uses Ohm's Law equation:

Where:

• \( I \) — Current in amperes (A)
• \( V \) — Voltage in volts (V)
• \( R \) — Resistance in ohms (Ω)

Explanation: The equation shows that current increases with increasing voltage and decreases with increasing resistance, following a linear relationship.

3. Importance of Ohm's Law

Details: Ohm's Law is essential for circuit design, analysis, and troubleshooting. It helps engineers and technicians calculate unknown values in electrical circuits, determine component ratings, and ensure safe operation of electrical systems.

4. Using the Calculator

Tips: Enter voltage in volts (V) and resistance in ohms (Ω). Both values must be positive numbers greater than zero. The calculator will compute the current in amperes (A).

5. Frequently Asked Questions (FAQ)

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

Q2: Does Ohm's Law apply to AC circuits?
A: Ohm's Law applies to resistive AC circuits, but for circuits with capacitors and inductors, impedance must be used instead of resistance.

Q3: What is the power formula related to Ohm's Law?
A: Power (P) can be calculated as P = V × I, P = I² × R, or P = V² / R, all derived from Ohm's Law.

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 calculations based on the input values, assuming ideal conditions and ohmic behavior.