1. What is the Voltage Formula?

The voltage formula V = P / I calculates electrical voltage from power and current. This fundamental electrical equation is derived from the power formula P = V × I, rearranged to solve for voltage.

2. How Does the Calculator Work?

The calculator uses the voltage formula:

Where:

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

Explanation: This formula calculates the electrical potential difference (voltage) when you know the power consumption and current flow in a circuit.

3. Importance of Voltage Calculation

Details: Accurate voltage calculation is essential for circuit design, electrical system analysis, power management, and ensuring proper operation of electrical devices and components.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: What are the units for each variable?
A: Voltage is measured in volts (V), power in watts (W), and current in amperes (amps, A).

Q2: Can this formula be used for AC circuits?
A: This formula works for DC circuits. For AC circuits with reactive components, additional factors like power factor must be considered.

Q3: What is a typical voltage range?
A: Common voltages range from millivolts (mV) in small electronics to hundreds of volts in power systems, and kilovolts (kV) in transmission lines.

Q4: How does voltage relate to electrical safety?
A: Higher voltages can be more dangerous. Understanding voltage levels is crucial for proper insulation, grounding, and safety measures in electrical systems.

Q5: Can I calculate power if I know voltage and current?
A: Yes, using the formula P = V × I, which is the original power formula from which V = P / I is derived.