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, electrical safety, component selection, and troubleshooting electrical systems.

4. Using the Calculator

Tips: Enter current in amperes (A) and resistance in ohms (Ω). Both values must be positive numbers greater than zero.

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: Can Ohm's Law be used for AC circuits?
A: Ohm's Law applies to both DC circuits and AC circuits with purely resistive loads. For reactive components, impedance must be considered.

Q3: What is the relationship between the three variables?
A: Voltage is directly proportional to both current and resistance. If current increases, voltage increases (with constant resistance). If resistance increases, voltage increases (with constant current).

Q4: Are there limitations to Ohm's Law?
A: Ohm's Law applies to ohmic materials where resistance remains constant. It may not accurately describe non-ohmic materials like semiconductors or components that change resistance with temperature.

Q5: How is Ohm's Law used in practical applications?
A: It's used in circuit design, electrical troubleshooting, component sizing, power calculation, and safety analysis in electrical systems.