1. What is the Current Formula?

The current formula I = P/V calculates electrical current (I) from power (P) and voltage (V). This is a fundamental equation in electrical engineering and physics that relates these three important electrical quantities.

2. How Does the Calculator Work?

The calculator uses the current formula:

Where:

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

Explanation: This formula directly calculates current by dividing power by voltage, based on the fundamental relationship between these electrical properties.

3. Importance of Current Calculation

Details: Accurate current calculation is essential for circuit design, electrical safety assessments, component selection, and power system analysis in various electrical applications.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: What units should I use for this calculation?
A: Use watts for power and volts for voltage to get current in amperes. Ensure consistent units for accurate results.

Q2: Does this formula work for both AC and DC circuits?
A: This formula works for DC circuits and for AC circuits with purely resistive loads. For reactive AC loads, power factor must be considered.

Q3: What is a typical current range for household appliances?
A: Household appliances typically draw currents ranging from 0.5A (small devices) to 15-20A (large appliances like air conditioners or electric heaters).

Q4: How does current relate to wire sizing?
A: Current determines the appropriate wire gauge - higher currents require thicker wires to prevent overheating and ensure safety.

Q5: Can I use this formula for three-phase systems?
A: For three-phase systems, the formula becomes more complex. You would need to use I = P/(V×√3×PF) where PF is the power factor.