1. What Is Electrical Power?

Electrical power is the rate at which electrical energy is transferred by an electric circuit. It represents how much work can be done by an electrical device in a given time and is measured in watts (W).

2. How Does The Power Calculator Work?

The calculator uses the fundamental power formula:

Where:

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

Explanation: This formula calculates the electrical power consumed by a device when you know the voltage applied and the current flowing through it.

3. Importance Of Power Calculation

Details: Calculating power consumption is essential for electrical safety, circuit design, energy efficiency analysis, and determining operating costs of electrical devices.

4. Using The Calculator

Tips: Enter voltage in volts and current in amperes. Both values must be positive numbers greater than zero for accurate calculation.

5. Frequently Asked Questions (FAQ)

Q1: What is the difference between power and energy?
A: Power is the rate of energy consumption (watts), while energy is the total amount consumed over time (watt-hours).

Q2: How do I calculate energy consumption from power?
A: Energy (kWh) = Power (kW) × Time (hours). Multiply power in kilowatts by usage time in hours.

Q3: What are typical power ratings for household appliances?
A: LED bulb: 5-15W, Laptop: 30-90W, Refrigerator: 100-800W, Microwave: 600-1200W, Air conditioner: 1000-4000W.

Q4: Can I use this formula for AC and DC circuits?
A: This formula works for DC circuits and AC circuits with purely resistive loads. For AC with reactive components, power factor must be considered.

Q5: How does power relate to electricity bills?
A: Electricity bills are based on energy consumption (kWh). Higher power devices used for longer periods result in higher energy bills.