1. What is the Voltage Calculation Formula?

The voltage calculation formula V = P / I is derived from the basic electrical power formula, where voltage equals power divided by current. This relationship is fundamental in electrical engineering and circuit analysis.

2. How Does the Calculator Work?

The calculator uses the voltage formula:

Where:

• \( V \) — Voltage in volts
• \( P \) — Power in watts
• \( I \) — Current in amperes

Explanation: The formula shows the direct relationship between power and voltage when current is known. Higher power with the same current results in higher voltage.

3. Importance of Voltage Calculation

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

4. Using the Calculator

Tips: Enter power in watts and current in amps. Both values must be positive numbers. The calculator will compute the voltage in volts.

5. Frequently Asked Questions (FAQ)

Q1: Can this formula be used for both AC and DC circuits?
A: For DC circuits, it's straightforward. For AC circuits, it applies to the real power component (not apparent power).

Q2: What if I know resistance instead of current?
A: You can use V = √(P × R) if you know power and resistance.

Q3: What are typical voltage values in household circuits?
A: In North America, typically 120V or 240V. In Europe, typically 230V.

Q4: How does voltage relate to electrical safety?
A: Higher voltages can be more dangerous, but current is the primary factor in electrical shock hazards.

Q5: Can I use this for three-phase power calculations?
A: For three-phase systems, you need to account for the power factor and phase relationships.