1. What is the Power Formula?

The power formula W = V × I calculates electrical power in watts from voltage (V) and current (I). This fundamental equation is used to determine the power consumption or generation in electrical circuits.

2. How Does the Calculator Work?

The calculator uses the power formula:

Where:

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

Explanation: This formula represents the basic relationship between electrical power, voltage, and current in DC circuits and AC circuits with resistive loads.

3. Importance of Power Calculation

Details: Accurate power calculation is essential for electrical system design, energy consumption analysis, circuit protection sizing, and equipment selection in various electrical applications.

4. Using the Calculator

Tips: Enter voltage in volts and current in amperes. Both values must be positive numbers greater than zero for accurate calculation.

5. Frequently Asked Questions (FAQ)

Q1: Does this formula work for AC circuits?
A: For purely resistive AC loads, yes. For reactive loads, power factor must be considered for accurate power calculation.

Q2: What is the significance of 60Hz in the title?
A: 60Hz refers to the standard AC frequency in many regions. While the basic power formula W = V × I applies, AC power calculations may require additional factors for reactive loads.

Q3: How is this different from apparent power?
A: This formula calculates real power (watts). Apparent power (VA) includes both real and reactive power components.

Q4: Can I use this for three-phase systems?
A: For three-phase systems, additional factors like √3 and power factor need to be included in the calculation.

Q5: What are typical power values for household appliances?
A: Household appliances typically range from a few watts (LED bulbs) to several thousand watts (electric heaters, air conditioners).