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 (amps)
• \( R \) — 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, ensuring proper component operation, and maintaining electrical safety standards.

4. Using the Calculator

Tips: Enter current in amps and resistance in ohms. All values must be valid positive numbers greater than zero.

5. Frequently Asked Questions (FAQ)

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

Q2: Can Ohm's Law be applied to AC circuits?
A: Ohm's Law applies to both DC circuits and AC circuits with purely resistive loads. For AC circuits with reactive components, impedance must be considered.

Q3: What is the typical voltage range for household circuits?
A: Most household circuits operate at 120V or 240V, depending on the country and application.

Q4: Are there limitations to Ohm's Law?
A: Ohm's Law applies to ohmic materials where resistance remains constant. It doesn't apply to non-ohmic materials like diodes and transistors where resistance varies with voltage.

Q5: How is voltage measured in practice?
A: Voltage is typically measured using a voltmeter connected in parallel across the component or circuit where voltage measurement is needed.