1. What is a Voltage Calculator?

Definition: This calculator determines the voltage in an electrical circuit based on power and current using Ohm's Law.

Purpose: It helps electricians, engineers, and students quickly calculate voltage when power and current are known.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

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

Explanation: Voltage is calculated by dividing power by current. This is derived from the basic electrical power formula P = VI.

3. Importance of Voltage Calculation

Details: Accurate voltage calculation is essential for circuit design, electrical safety, and proper equipment operation.

4. Using the Calculator

Tips: Enter the power in watts and current in amps. Both values must be positive numbers greater than 0.

5. Frequently Asked Questions (FAQ)

Q1: What units should I use for the inputs?
A: Power should be in watts and current in amps for accurate voltage calculation in volts.

Q2: Can I use this for AC and DC circuits?
A: This formula works for DC circuits. For AC circuits, power factor must be considered.

Q3: What if I know resistance instead of current?
A: Use V = √(P × R) where R is resistance in ohms.

Q4: Why is my calculated voltage different from measured voltage?
A: Real-world factors like resistance, power factor, and circuit efficiency can cause differences.

Q5: What's a typical household voltage?
A: In most countries, standard household voltage is either 120V or 230V.