1. What is Ohm's Law?

Ohm's Law states that the voltage across a conductor is directly proportional to the current flowing through it, with the constant of proportionality being the resistance. It's a fundamental principle in electrical engineering and physics.

2. How Does the Calculator Work?

The calculator uses Ohm's Law equation:

Where:

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

Explanation: The equation shows the linear relationship between voltage, current, and resistance in an electrical circuit.

3. Importance of Voltage Calculation

Details: Understanding voltage is crucial for designing electrical circuits, selecting appropriate components, and ensuring safety in electrical systems.

4. Using the Calculator

Tips: Enter current in amperes and resistance in ohms. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What are typical current values in household circuits?
A: Typical household circuits in the US carry 15-20 amps at 120 volts.

Q2: How does resistance affect voltage?
A: For a given current, higher resistance results in higher voltage drop across the resistor.

Q3: When is Ohm's Law not applicable?
A: Ohm's Law applies to ohmic materials. It doesn't apply to non-ohmic materials like diodes or when temperature changes significantly affect resistance.

Q4: What's the difference between AC and DC in Ohm's Law?
A: Ohm's Law applies to both, but with AC you must consider impedance (which includes resistance and reactance) rather than just resistance.

Q5: How accurate is this calculator?
A: The calculator is mathematically precise, but real-world applications must consider factors like temperature, material properties, and circuit design.