1. What is a Voltage Calculator?

Definition: This calculator determines voltage from known values of power (watts) and current (amps) using Ohm's Law.

Purpose: It helps electricians, engineers, and electronics enthusiasts calculate voltage when designing or troubleshooting circuits.

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, derived from the basic power formula P = VI.

3. Importance of Voltage Calculation

Details: Accurate voltage calculation ensures proper circuit design, component selection, and electrical safety in all types of electrical systems.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: What if I know voltage and want to find current or power?
A: Use variations of the formula: I = P/V for current or P = VI for power.

Q2: Does this work for both AC and DC circuits?
A: Yes, but for AC circuits this gives RMS voltage when using RMS values for power and current.

Q3: What's a typical household circuit current?
A: In North America, standard circuits are 15 or 20 amps at 120 volts.

Q4: How do I measure power and current?
A: Use a wattmeter for power and an ammeter for current measurements.

Q5: What about three-phase power systems?
A: This calculator is for single-phase systems. Three-phase requires different calculations.