1. What is Ohm's Law?

Ohm's Law is a fundamental principle in electrical engineering that states the relationship between voltage (V), current (I), and resistance (R) in an electrical circuit. It provides the mathematical foundation for analyzing and designing electrical circuits.

2. How Does the Calculator Work?

The calculator uses Ohm's Law equation:

Where:

• \( V \) — Voltage (Volts)
• \( I \) — Current (Amperes)
• \( R \) — Resistance (Ohms)

Explanation: The equation shows that voltage is directly proportional to both current and resistance in an electrical circuit.

3. Importance of Voltage Calculation

Details: Accurate voltage calculation is crucial for circuit design, electrical safety analysis, component selection, and troubleshooting electrical systems.

4. Using the Calculator

Tips: Enter current in amperes (A) and resistance in ohms (Ω). Both values must be positive numbers greater than zero.

5. Frequently Asked Questions (FAQ)

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

Q2: Can Ohm's Law be rearranged for other calculations?
A: Yes, the formula can be rearranged as \( I = V/R \) for current calculation and \( R = V/I \) for resistance calculation.

Q3: Does Ohm's Law apply to all electrical components?
A: Ohm's Law applies specifically to ohmic conductors (components with constant resistance). It doesn't apply to non-ohmic devices like diodes and transistors.

Q4: What is the typical voltage range in household circuits?
A: Most household circuits operate at 120V or 240V, depending on the country and electrical system.

Q5: How does temperature affect resistance in Ohm's Law?
A: For most conductors, resistance increases with temperature. This relationship is described by the temperature coefficient of resistance.