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 in a circuit.

3. Importance of Ohm's Law

Details: Ohm's Law is essential for designing and analyzing electrical circuits, calculating power consumption, and troubleshooting electrical problems in various applications.

4. Using the Calculator

Tips: Enter current in amps and resistance in ohms. All values must be valid positive numbers greater than zero.

5. Frequently Asked Questions (FAQ)

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

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

Q3: Does Ohm's Law apply to all electrical components?
A: Ohm's Law applies to ohmic conductors where resistance remains constant. It doesn't apply to non-ohmic materials like diodes and transistors.

Q4: What is the relationship between power and Ohm's Law?
A: Power (P) can be calculated using \( P = V \times I \), which can be combined with Ohm's Law to get \( P = I^2 \times R \) or \( P = V^2 / R \).

Q5: Why is Ohm's Law important for electricians?
A: Electricians use Ohm's Law to calculate appropriate wire sizes, determine circuit protection requirements, and troubleshoot electrical faults.