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 in Volts (V)
• \( I \) — Current in Amperes (A)
• \( R \) — Resistance in Ohms (Ω)

Explanation: The voltage is calculated by multiplying the current (in amps) by the resistance (in ohms).

3. Importance of Voltage Calculation

Details: Accurate voltage calculation is crucial for designing electrical circuits, selecting appropriate components, and ensuring safe operation of electrical systems.

4. Using the Calculator

Tips: Enter current in amps and resistance in ohms. Both values must be positive numbers. The calculator will compute the voltage using Ohm's Law.

5. Frequently Asked Questions (FAQ)

Q1: What if I know voltage and want to find current?
A: You can rearrange the formula: \( I = V / R \). Current equals voltage divided by resistance.

Q2: What if I know voltage and current and want to find resistance?
A: You can rearrange the formula: \( R = V / I \). Resistance equals voltage divided by current.

Q3: 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.

Q4: What are typical voltage values in household circuits?
A: In the US, standard household voltage is 120V, while in many other countries it's 230V.

Q5: How accurate is this calculation?
A: The calculation is mathematically exact for ohmic materials under constant conditions. Real-world factors like temperature may affect actual values.