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 forms the basis for analyzing electrical circuits.

3. Importance of Ohm's Law

Details: Ohm's Law is essential for designing, analyzing, and troubleshooting electrical circuits. It helps engineers calculate unknown values in circuits and ensure proper component selection.

4. Using the Calculator

Tips: Enter current in amps 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 (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 materials where resistance remains constant. It doesn't apply to non-ohmic components 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: How accurate is Ohm's Law in real-world applications?
A: Ohm's Law is highly accurate for DC circuits with constant resistance. For AC circuits, impedance must be considered instead of pure resistance.