1. What is the Wattage Formula?

The Wattage Formula (P = V × I) calculates electrical power in watts by multiplying voltage (in volts) by current (in amperes). This fundamental equation is essential in electrical engineering and physics.

2. How Does the Calculator Work?

The calculator uses the Wattage Formula:

Where:

• \( P \) — Power in Watts (W)
• \( V \) — Voltage in Volts (V)
• \( I \) — Current in Amperes (A)

Explanation: The formula shows the direct relationship between voltage, current, and power in an electrical circuit.

3. Importance of Wattage Calculation

Details: Calculating wattage is crucial for designing electrical systems, determining power consumption, selecting appropriate components, and ensuring electrical safety.

4. Using the Calculator

Tips: Enter voltage in volts and current in amperes. Both values must be positive numbers. The calculator will compute the power in watts.

5. Frequently Asked Questions (FAQ)

Q1: Can this formula be used for both AC and DC circuits?
A: For DC circuits, it's straightforward. For AC circuits, you need to consider power factor for accurate calculations.

Q2: What are typical household appliance wattages?
A: LED bulbs (5-20W), laptops (30-90W), refrigerators (100-800W), microwaves (600-1200W).

Q3: How does wattage relate to energy consumption?
A: Energy (kWh) = Power (kW) × Time (hours). Wattage indicates instantaneous power usage.

Q4: What's the difference between watts and volt-amps?
A: Watts measure real power, while volt-amps measure apparent power (important in AC circuits with reactive loads).

Q5: How can I measure voltage and current?
A: Use a multimeter - connect in parallel for voltage measurement, in series for current measurement.