1. What is Electrical Power Calculation?

Definition: This calculator computes the electrical power based on voltage and current using Ohm's law.

Purpose: It helps electricians, engineers, and students determine the power consumption or generation in electrical circuits.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

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

Explanation: The product of voltage and current gives the electrical power in watts.

3. Importance of Power Calculation

Details: Proper power calculation ensures correct circuit design, proper component selection, and energy efficiency.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: What units does this calculator use?
A: The calculator uses volts for voltage, amperes for current, and outputs power in watts.

Q2: Does this work for both AC and DC circuits?
A: This formula works directly for DC circuits. For AC circuits, it gives apparent power (for real power, you'd need power factor).

Q3: What's a typical voltage for household circuits?
A: In North America, 120V is standard, while many other countries use 230V.

Q4: How can I measure current safely?
A: Use a multimeter or clamp meter rated for the expected current range.

Q5: What if I know resistance instead of current?
A: You can use P = V²/R or P = I²R depending on what values you know.