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 resistance being the constant of proportionality. 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: Calculating voltage is essential for designing electrical circuits, troubleshooting electrical problems, and ensuring proper operation of electronic devices.

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 voltage values in household circuits?
A: In North America, standard household voltage is 120V, while in many other countries it's 230V.

Q2: Does Ohm's Law apply to all materials?
A: Ohm's Law applies to "ohmic" materials where resistance is constant. Some materials like semiconductors are non-ohmic.

Q3: What if I know voltage and want to find current?
A: The equation can be rearranged: \( I = V / R \). Similarly, \( R = V / I \) for finding resistance.

Q4: How accurate is this calculation?
A: The calculation is mathematically exact for ideal ohmic conductors at constant temperature.

Q5: What affects resistance in real circuits?
A: Resistance depends on material, length, cross-sectional area, and temperature of the conductor.