1. What is the Power Formula?

The power formula P = I × V calculates electrical power in watts from current (in amperes) and voltage (in volts). It is a fundamental equation in electrical engineering and physics.

2. How Does the Calculator Work?

The calculator uses the power formula:

Where:

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

Explanation: This formula directly multiplies current and voltage to determine the power consumption or production in an electrical circuit.

3. Importance of Power Calculation

Details: Calculating power is essential for designing electrical systems, determining energy consumption, sizing components, and ensuring electrical safety.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: What units are used in this calculation?
A: Current is measured in amperes (A), voltage in volts (V), and the resulting power in watts (W).

Q2: Can this formula be used for both AC and DC circuits?
A: For DC circuits and AC circuits with purely resistive loads, yes. For reactive AC loads, additional factors like power factor must be considered.

Q3: What is the relationship between power, current and voltage?
A: Power is directly proportional to both current and voltage. Doubling either current or voltage will double the power.

Q4: How accurate is this calculation?
A: The calculation is mathematically exact for the given inputs. Accuracy depends on the precision of your current and voltage measurements.

Q5: What are typical power values in household appliances?
A: Household appliances typically range from a few watts (LED bulbs) to several thousand watts (electric heaters, ovens).