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

Explanation: The equation shows that voltage equals current multiplied by resistance in an ideal conductor.

3. Importance of Voltage Calculation

Details: Calculating voltage is essential for designing electrical circuits, determining power requirements, and ensuring proper operation of electronic devices.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: Can Ohm's Law be applied to all materials?
A: Ohm's Law applies to ohmic materials (like most metals) but not to non-ohmic materials (like diodes and transistors).

Q2: What are typical current values in household circuits?
A: Household circuits typically carry 15-20 amperes at 120 volts (North America) or 230 volts (Europe).

Q3: How does temperature affect resistance?
A: For most conductors, resistance increases with temperature. Some materials like semiconductors show the opposite behavior.

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

Q5: Can I calculate power with this?
A: Power (P) can be calculated as \( P = V \times I \), which becomes \( P = I^2 \times R \) using Ohm's Law.