1. What is Electrical Power?

Electrical power is the rate at which electrical energy is transferred by an electric circuit. It represents the amount of work done by electricity per unit time and is measured in watts (W).

2. How Does the 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 or produced in a circuit by multiplying the voltage across the circuit by the current flowing through it.

3. Importance of Power Calculation

Details: Accurate power calculation is essential for circuit design, energy consumption analysis, electrical safety, component selection, and determining the efficiency of electrical systems.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: What is the difference between AC and DC power calculation?
A: For DC circuits, P = V × I directly. For AC circuits with resistive loads, it's similar, but for reactive loads, power factor must be considered.

Q2: How does power relate to energy consumption?
A: Energy consumption = Power × Time. For example, a 100W device running for 10 hours consumes 1 kWh of energy.

Q3: What are typical power ratings for household appliances?
A: LED bulb: 5-15W, Laptop: 50-100W, Refrigerator: 100-400W, Microwave: 800-1500W, Air conditioner: 1000-3500W.

Q4: How can I measure voltage and current?
A: Use a multimeter - connect in parallel for voltage measurement and in series for current measurement.

Q5: What safety precautions should I take?
A: Always work with circuits turned off when possible, use proper insulation, and ensure components can handle the calculated power to prevent overheating.