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 the Ohm's Law equation:

Where:

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

Explanation: The equation shows that voltage equals current multiplied by resistance. This relationship is linear when resistance is constant.

3. Importance of Ohm's Law

Details: Ohm's Law is essential for designing and analyzing electrical circuits, calculating power consumption, selecting appropriate components, and troubleshooting electrical systems.

4. Using the Calculator

Tips: Enter current in amperes and resistance in ohms. Both values must be positive numbers greater than zero for accurate calculation.

5. Frequently Asked Questions (FAQ)

Q1: Can Ohm's Law be rearranged for different calculations?
A: Yes, the formula can be rearranged as I = V/R to calculate current, or R = V/I to calculate resistance.

Q2: Does Ohm's Law apply to all electrical components?
A: Ohm's Law applies to ohmic materials where resistance remains constant. It doesn't apply to non-ohmic components like diodes and transistors.

Q3: What are typical voltage values in household circuits?
A: In North America, standard household voltage is 120V, while in Europe it's typically 220-240V.

Q4: How does temperature affect resistance?
A: For most conductors, resistance increases with temperature. For semiconductors, resistance typically decreases with temperature.

Q5: What is the relationship between power and Ohm's Law?
A: Power (P) can be calculated using P = V×I, or by substituting Ohm's Law: P = I²×R or P = V²/R.