1. What is Current?

Current (I) is the rate at which electric charge flows past a point in a circuit. Measured in amperes (A), it's one of the fundamental quantities in electrical engineering and physics.

2. How Does the Calculator Work?

The calculator uses three fundamental electrical formulas:

Where:

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

Explanation: These formulas represent different relationships between electrical quantities based on Ohm's Law and power equations.

3. Importance of Current Calculation

Details: Calculating current is essential for circuit design, component selection, safety analysis, and power system planning in electrical engineering.

4. Using the Calculator

Tips: Enter any two known values (power, resistance, or voltage) to calculate the current using different formulas. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: Which formula should I use?
A: It depends on which quantities you know. Use I=√(P/R) when you know power and resistance, I=P/V when you know power and voltage, and I=V/R when you know voltage and resistance.

Q2: What are typical current values?
A: Household circuits typically carry 15-20A, while electronic devices might use milliamps (mA). High-power systems can have hundreds of amps.

Q3: How accurate are these calculations?
A: These are theoretical calculations assuming ideal conditions. Real-world factors like temperature and component tolerances may affect actual current.

Q4: Can I use this for AC circuits?
A: These formulas work for DC circuits. For AC, you need to consider power factor and phase angles.

Q5: Why do I get different results from different formulas?
A: If all three formulas don't agree, your input values may not be consistent with each other according to electrical laws.