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.

2. How Does the Calculator Work?

The calculator uses the Ohm's Law equation:

Where:

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

Explanation: The equation shows that current increases when voltage increases or resistance decreases.

3. Importance of Current Calculation

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

4. Using the Calculator

Tips: Enter voltage in volts 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: Most household circuits carry 15-20 amps, though appliances may draw more current during startup.

Q2: How does wire gauge affect resistance?
A: Thicker wires (lower gauge numbers) have less resistance than thinner wires (higher gauge numbers).

Q3: What happens if resistance is zero?
A: This would create a short circuit with theoretically infinite current, which is dangerous and can damage components.

Q4: Does Ohm's Law apply to all materials?
A: Ohm's Law applies to "ohmic" materials where resistance is constant. Some materials like diodes are non-ohmic.

Q5: How does temperature affect resistance?
A: For most conductors, resistance increases with temperature. For semiconductors, resistance typically decreases with temperature.