1. What is the Current Calculation Formula?

The basic electrical formula I = P/V (Current equals Power divided by Voltage) is fundamental in electrical engineering and physics. It allows you to calculate the current flow when you know the power consumption and voltage.

2. How Does the Calculator Work?

The calculator uses the simple formula:

Where:

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

Explanation: This is Ohm's Law expressed in terms of power. It shows the relationship between electrical power, voltage, and current.

3. Importance of Current Calculation

Details: Calculating current is essential for circuit design, electrical safety, selecting proper wire sizes, and choosing circuit protection devices like fuses or breakers.

4. Using the Calculator

Tips: Enter power in watts and voltage in volts. Both values must be positive numbers. The calculator will compute the current in amperes.

5. Frequently Asked Questions (FAQ)

Q1: Can I use this for AC and DC circuits?
A: Yes, for simple resistive loads. For AC circuits with reactive components (inductors/capacitors), you need to consider power factor.

Q2: What's the difference between amps, volts and watts?
A: Volts measure electrical potential, amps measure current flow, and watts measure power (rate of energy consumption).

Q3: How do I convert amps to watts?
A: Use the inverse formula: P = I × V. Multiply amps by volts to get watts.

Q4: Why is current calculation important for safety?
A: Knowing current helps prevent circuit overloads which can cause fires. Wires and devices have maximum current ratings.

Q5: What if my device lists milliamps instead of amps?
A: 1 amp = 1000 milliamps. You can convert the result by multiplying by 1000 (e.g., 0.5A = 500mA).