1. What is the Voltage Formula?

The voltage formula (V = P/I) calculates the electrical potential difference (voltage) when you know the power in watts and the current in amperes. This is derived from the basic electrical power formula P = V × I.

2. How Does the Calculator Work?

The calculator uses the voltage formula:

Where:

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

Explanation: The formula shows the direct relationship between power and voltage when current is constant, and inverse relationship between current and voltage when power is constant.

3. Importance of Voltage Calculation

Details: Calculating voltage is essential for electrical circuit design, power distribution, and ensuring electrical devices receive the correct voltage for safe operation.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: Can I use this for AC and DC circuits?
A: This basic formula works for DC circuits. For AC circuits, you need to consider power factor for accurate calculations.

Q2: What if I know voltage and want to find watts or amps?
A: You can rearrange the formula: P = V × I for power, or I = P / V for current.

Q3: What are typical voltage values?
A: Common voltages include 1.5V (batteries), 12V (car systems), 120V (US household), and 230V (European household).

Q4: Why is voltage important?
A: Voltage determines how much electrical energy is available to power devices and affects electrical safety.

Q5: What's the relationship with resistance?
A: Using Ohm's Law (V = I × R), you can also calculate voltage if you know current and resistance.