1. What is Ohm's Law?

Ohm's Law 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. It's a fundamental principle in electrical engineering and physics.

2. How Does the Calculator Work?

The calculator uses Ohm's Law equation:

Where:

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

Explanation: The equation shows that current increases when voltage increases or resistance decreases, and vice versa.

3. Importance of Current Calculation

Details: Calculating current is essential for designing electrical circuits, selecting appropriate wire gauges, determining power requirements, and ensuring safety in electrical systems.

4. Using the Calculator

Tips: Enter voltage in volts and resistance in ohms. Both values must be positive numbers. The calculator will compute the current in amperes.

5. Frequently Asked Questions (FAQ)

Q1: Does Ohm's Law apply to AC circuits?
A: Ohm's Law in its basic form applies to DC circuits. For AC circuits, impedance (which includes resistance, inductance, and capacitance) must be considered.

Q2: What are typical current values in household circuits?
A: Standard household circuits in the US are typically 15 or 20 amps at 120 volts.

Q3: How does wire resistance affect current?
A: Longer or thinner wires have higher resistance, which can reduce current in a circuit if significant enough to affect the total resistance.

Q4: What happens when resistance approaches zero?
A: As resistance approaches zero, current approaches infinity (a short circuit), which is dangerous and can cause fires or equipment damage.

Q5: Can I calculate power with this information?
A: Yes, power (P) can be calculated as P = V × I or P = I² × R once you know the current.