1. What is Ohm's Law?

Ohm's Law is a fundamental principle in electrical engineering that describes the relationship between voltage, current, and resistance in an electrical circuit. The formula I = P/V calculates current from power and voltage.

2. How Does the Calculator Work?

The calculator uses the Ohm's Law formula:

Where:

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

Explanation: This formula calculates the electrical current flowing through a circuit when you know the power consumption and the voltage applied.

3. Importance of Current Calculation

Details: Accurate current calculation is crucial for circuit design, electrical safety, proper component selection, and preventing overloads in electrical systems.

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 the inputs?
A: Power should be in watts (W) and voltage should be in volts (V) for accurate results in amperes (A).

Q2: Can this formula be used for both AC and DC circuits?
A: Yes, for resistive loads in both AC and DC circuits. For reactive loads in AC circuits, power factor must be considered.

Q3: What is a typical current range for household appliances?
A: Most household appliances draw between 0.5-15 amps, depending on their power consumption and the voltage supply.

Q4: Why is current calculation important for electrical safety?
A: Knowing the current helps determine proper wire sizing, circuit breaker selection, and prevents overheating and potential fire hazards.

Q5: How does this relate to circuit protection?
A: Circuit breakers and fuses are rated for specific current levels. Calculating expected current helps select appropriate protection devices.