1. What is the Power Formula?

The power formula P = V × I is a fundamental equation in electrical engineering that calculates electrical power from voltage and current. It represents the rate at which electrical energy is transferred by an electric circuit.

2. How Does the Calculator Work?

The calculator uses the power formula:

Where:

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

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

3. Importance of Power Calculation

Details: Accurate power calculation is essential for circuit design, electrical system planning, energy consumption analysis, and ensuring electrical safety in various applications.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: What units are used in this calculation?
A: Voltage is measured in volts (V), current in amperes (A), and power in watts (W).

Q2: Does this formula work for both AC and DC circuits?
A: For DC circuits, it works directly. For AC circuits, it calculates apparent power, but true power requires considering power factor.

Q3: What is the relationship between power, voltage and current?
A: Power is the product of voltage and current. Higher voltage or current results in higher power consumption or output.

Q4: How is this formula used in real-world applications?
A: It's used for sizing electrical components, calculating energy costs, designing power systems, and determining circuit requirements.

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