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 the relationship between voltage, current, and resistance in an electrical circuit.

3. Importance of Voltage Calculation

Details: Calculating voltage is essential for designing electrical circuits, selecting appropriate components, and ensuring safe operation of electrical devices.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: What if I know voltage and want to find current?
A: You can rearrange the equation: \( I = V / R \). Similarly, \( R = V / I \) if you need to find resistance.

Q2: 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.

Q3: What are typical voltage values in household circuits?
A: In the US, standard household voltage is 120V for most circuits and 240V for large appliances.

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

Q5: Can I use this for AC circuits?
A: For AC circuits with only resistance (no capacitance/inductance), Ohm's Law applies to instantaneous values.