1. What is the Energy Equation?

The energy equation (Energy = Power × Time) calculates the amount of energy consumed or produced by an electrical device over a period of time. It's fundamental in electrical engineering and energy management.

2. How Does the Calculator Work?

The calculator uses the basic energy equation:

Where:

• \( Power \) — Power in watts (W)
• \( Time \) — Time in hours (h)

Explanation: The equation shows that energy is directly proportional to both power and time. Higher power devices or longer usage times result in greater energy consumption.

3. Importance of Energy Calculation

Details: Calculating energy consumption helps in estimating electricity costs, designing power systems, and evaluating energy efficiency of devices.

4. Using the Calculator

Tips: Enter power in watts and time in hours. Both values must be positive numbers. The result will be in watt-hours (Wh).

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between watts and watt-hours?
A: Watts measure power (rate of energy use), while watt-hours measure energy (total consumption over time).

Q2: How do I convert watt-hours to kilowatt-hours?
A: Divide watt-hours by 1000 (1 kWh = 1000 Wh).

Q3: Can I use this for DC and AC circuits?
A: Yes, as long as you use the correct power value (for AC circuits, use real power, not apparent power).

Q4: How accurate is this calculation?
A: It's accurate for constant power devices. For variable power devices, you may need to calculate energy for different time intervals separately.

Q5: What if my device shows current but not power?
A: For DC: Power = Current × Voltage. For AC: Power = Current × Voltage × Power Factor (if known).