1. What is Electrical Energy?

Electrical energy is the energy derived from electric potential energy or kinetic energy of charged particles. It represents the work done by an electric circuit and is measured in joules.

2. How Does the Calculator Work?

The calculator uses the electrical energy formula:

Where:

• \( E \) — Electrical energy (joules)
• \( P \) — Power (watts)
• \( t \) — Time (seconds)

Explanation: This formula calculates the total energy consumed or produced by an electrical device based on its power rating and the duration of operation.

3. Importance of Electrical Energy Calculation

Details: Calculating electrical energy is essential for determining energy consumption, estimating electricity costs, designing electrical systems, and understanding energy efficiency in various applications.

4. Using the Calculator

Tips: Enter power in watts and time in seconds. Both values must be positive numbers. The calculator will compute the electrical energy in joules.

5. Frequently Asked Questions (FAQ)

Q1: What is the difference between power and energy?
A: Power is the rate at which energy is consumed or produced (watts), while energy is the total amount of work done (joules).

Q2: How do I convert joules to kilowatt-hours?
A: To convert joules to kilowatt-hours, divide the energy in joules by 3,600,000 (since 1 kWh = 3,600,000 J).

Q3: Can this formula be used for AC circuits?
A: For AC circuits with resistive loads, this formula works. For reactive loads, power factor must be considered.

Q4: What are typical power values for household appliances?
A: LED bulb: 5-15W, Laptop: 50-100W, Refrigerator: 100-200W, Microwave: 800-1200W.

Q5: Why is electrical energy measured in joules?
A: The joule is the SI unit of energy, representing the work done when a force of one newton moves an object one meter.