1. What is Ohm's Law?

Ohm's Law is a fundamental principle in electrical engineering that describes the relationship between voltage, current, and resistance in an electrical circuit. It states that the voltage across a conductor is directly proportional to the current flowing through it, with the constant of proportionality being the resistance.

2. How Does the Calculator Work?

The calculator uses Ohm's Law equation:

Where:

• \( V \) — Voltage (Volts)
• \( I \) — Current (Amperes)
• \( R \) — Resistance (Ohms)

Explanation: The equation shows that voltage equals the product of current and resistance in a circuit.

3. Importance of Voltage Calculation

Details: Accurate voltage calculation is crucial for circuit design, troubleshooting electrical systems, determining power requirements, and ensuring proper operation of electrical components.

4. Using the Calculator

Tips: Enter current in amperes (A) and resistance in ohms (Ω). All values must be valid (current > 0, resistance > 0).

5. Frequently Asked Questions (FAQ)

Q1: What are the units for Ohm's Law?
A: Voltage is measured in volts (V), current in amperes (A), and resistance in ohms (Ω).

Q2: Does Ohm's Law apply to all circuits?
A: Ohm's Law applies to resistive circuits and components that follow a linear relationship between voltage and current.

Q3: What is the power relationship in electrical circuits?
A: Power (P) can be calculated as P = V × I, or using the variants P = I² × R and P = V² / R.

Q4: How does temperature affect resistance?
A: For most conductors, resistance increases with temperature, while for semiconductors, resistance typically decreases with temperature.

Q5: Can Ohm's Law be used for AC circuits?
A: For AC circuits with purely resistive loads, Ohm's Law applies directly. For reactive components (inductors, capacitors), impedance must be considered instead of resistance.