1. What is Watt-hours (Wh)?

Watt-hours (Wh) is a unit of energy that measures how much power (in watts) is used over time (in hours). It helps us understand how much electricity devices use.

2. How Does the Calculator Work?

The calculator uses the simple equation:

Where:

• \( Wh \) — Watt-hours (energy)
• \( W \) — Watts (power)
• \( h \) — Hours (time)

Explanation: If a device uses 10 watts for 2 hours, it consumes 20 watt-hours of energy.

3. Importance of Energy Calculation

Details: Understanding watt-hours helps kids learn about electricity usage, battery life, and energy conservation.

4. Using the Calculator

Tips: Enter power in watts and time in hours. Both values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between watts and watt-hours?
A: Watts measure power (how fast energy is used), while watt-hours measure energy (total amount used over time).

Q2: How many watt-hours does a light bulb use?
A: A 10-watt bulb running for 5 hours uses 50 watt-hours (10W × 5h = 50Wh).

Q3: What can 100 watt-hours power?
A: It could power a 10-watt device for 10 hours, or a 50-watt device for 2 hours.

Q4: How is this different from kWh?
A: 1 kilowatt-hour (kWh) = 1000 watt-hours (Wh). kWh is used for larger amounts of energy.

Q5: Why is this important for kids to learn?
A: It helps them understand energy usage and make smart choices about electricity consumption.