1. What is Ohm's Law and Power Formula?

Ohm's Law (V = I × R) describes the relationship between voltage, current, and resistance in an electrical circuit. The power formula (P = V × I) calculates the electrical power consumed or produced in a circuit.

2. How Does the Calculator Work?

The calculator uses the fundamental electrical formulas:

Where:

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

Explanation: Enter any two known values and the calculator will compute the remaining unknown values using these fundamental electrical relationships.

3. Importance of Electrical Calculations

Details: Accurate electrical calculations are essential for circuit design, component selection, power management, and ensuring electrical safety in various applications.

4. Using the Calculator

Tips: Enter any two known values (voltage, current, resistance, or power) and the calculator will automatically compute the missing values. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What is the difference between AC and DC calculations?
A: These formulas work for both AC and DC circuits, though for AC circuits with reactive components, additional factors like power factor need to be considered.

Q2: How accurate are these calculations?
A: The calculations are mathematically precise based on the input values. Real-world accuracy depends on the precision of your measurements.

Q3: Can I calculate power in three-phase systems?
A: For three-phase systems, additional factors like phase angle and power factor need to be considered beyond these basic formulas.

Q4: What are typical units for these measurements?
A: Voltage in volts (V), current in amperes (A), resistance in ohms (Ω), and power in watts (W).

Q5: How do I measure these values in a circuit?
A: Use a multimeter to measure voltage and resistance, and a clamp meter or multimeter with current measurement capability to measure current.