1. What is the Voltage Formula?

The voltage formula V = P/I calculates the electrical potential difference (voltage) when you know the power and current in a circuit. This is derived from the fundamental relationship between power, voltage, and current in electrical systems.

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 that voltage is directly proportional to power and inversely proportional to current in a circuit.

3. Importance of Voltage Calculation

Details: Calculating voltage is essential for circuit design, troubleshooting electrical systems, and ensuring components receive the correct operating voltage.

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: What if I get zero voltage?
A: This would only happen if either power is zero (no energy transfer) or current approaches infinity (short circuit), both unrealistic in normal conditions.

Q2: Does this work 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.

Q3: What are typical voltage values?
A: Common voltages range from 1.5V (batteries) to 120V/240V (household) to thousands of volts (power transmission).

Q4: Can I calculate power if I know voltage and current?
A: Yes, using P = V × I. These three values are related through Ohm's Law and the power formula.

Q5: Why is voltage important?
A: Voltage determines how much electrical energy is available to do work and must match a device's requirements for proper operation.