1. What is the Voltage Formula?

The voltage formula V = P/I calculates the potential difference (voltage) between two points when the power (P) and current (I) are known. This is a rearrangement of the fundamental power formula P = VI.

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 that voltage is directly proportional to power and inversely proportional to current.

3. Importance of Voltage Calculation

Details: Calculating voltage from known power and current is essential in electrical circuit design, power distribution systems, and electronic device development.

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: What if I get zero or negative values?
A: Both power and current must be positive values. Zero or negative values are not physically meaningful in this context.

Q2: Does this work for AC and DC circuits?
A: This formula works for DC circuits. For AC circuits, you need to consider power factor for accurate calculations.

Q3: What are typical voltage values in household circuits?
A: Common household voltages are 120V (North America) and 230V (many other countries) for AC power.

Q4: Can I use this for three-phase power calculations?
A: For three-phase systems, you need to include the power factor and use the appropriate three-phase power formula.

Q5: Why is my calculated voltage different from what I measure?
A: Real-world measurements may differ due to resistance, power factor, measurement errors, or circuit inefficiencies.