1. What is the Power Equation?

The fundamental power equation in electrical systems relates power (P), voltage (V), and current (I). It provides the basis for understanding energy consumption and electrical system design.

2. How Does the Calculator Work?

The calculator uses the power equation:

Where:

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

Explanation: This equation shows that power is directly proportional to both voltage and current. Doubling either voltage or current will double the power.

3. Importance of Power Calculation

Details: Calculating power is essential for designing electrical systems, selecting appropriate wiring and components, and understanding energy consumption.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between AC and DC power calculations?
A: For DC systems, this simple formula works directly. For AC systems, you may need to consider power factor for accurate calculations.

Q2: How do I convert watts to kilowatts?
A: Simply divide the watt value by 1000 (1 kW = 1000 W).

Q3: Why is power calculation important?
A: It helps determine energy consumption, circuit requirements, and prevents overloading electrical systems.

Q4: Can I use this for three-phase systems?
A: For three-phase systems, you'll need to include the square root of 3 (1.732) in your calculation.

Q5: How does this relate to energy bills?
A: Energy companies typically bill in kilowatt-hours (kWh), which is power (kW) multiplied by time (hours).