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 any electrical circuit.

3. Importance of Ohm's Law

Details: Ohm's Law is essential for designing and analyzing electrical circuits, calculating power consumption, and ensuring electrical safety 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 resistive circuits, but may not accurately describe components with non-linear characteristics like diodes and transistors.

Q4: What is the power relationship in electrical circuits?
A: Power (P) can be calculated as P = V × I, or using variations P = I² × R or P = V² / R.

Q5: How accurate is Ohm's Law in real-world applications?
A: Ohm's Law is highly accurate for DC circuits and resistive AC circuits, but factors like temperature and material properties can affect resistance values.