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 the Ohm's Law equation:

Where:

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

Explanation: The equation shows that voltage equals the product of current and 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 systems. It forms the foundation for understanding electrical relationships in various applications.

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: What are the units used 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 applied to AC circuits?
A: Yes, but with modifications for impedance in AC circuits. The basic V=IR relationship holds for resistive components.

Q3: What is the power relationship in electrical circuits?
A: Power (P) can be calculated as P = V × I, or using variations like P = I² × R or P = V² / R.

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 is resistance calculated if voltage and current are known?
A: Resistance can be calculated as R = V / I using the rearranged Ohm's Law formula.