1. What is the Power Formula?

The power formula P = V × I calculates electrical power in DC circuits, where P represents power in watts, V represents voltage in volts, and I represents current in amps.

2. How Does the Calculator Work?

The calculator uses the power formula:

Where:

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

Explanation: This fundamental formula expresses the relationship between electrical power, voltage, and current in direct current circuits.

3. Importance of Power Calculation

Details: Accurate power calculation is essential for circuit design, electrical safety, energy consumption analysis, and proper component selection in electrical systems.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: Is this formula only for DC circuits?
A: Yes, P = V × I applies specifically to DC circuits. For AC circuits, power calculation involves additional factors like power factor.

Q2: What are typical power values in household circuits?
A: Household appliances typically range from a few watts (LED bulbs) to thousands of watts (heaters, air conditioners).

Q3: How does power relate to energy consumption?
A: Power (watts) multiplied by time (hours) gives energy consumption (watt-hours), which is what utility companies bill for.

Q4: Can this formula be rearranged to find voltage or current?
A: Yes, the formula can be rearranged as V = P ÷ I to find voltage, or I = P ÷ V to find current.

Q5: What safety considerations are important when working with electrical power?
A: Always ensure circuits are properly rated for calculated power, use appropriate safety equipment, and follow electrical codes and standards.