1. What is Voltage?

Voltage (V) is the electric potential difference between two points, defined as the energy (E) per unit charge (Q). It's measured in volts (V) and represents the "push" that drives electric current through a circuit.

2. How Does the Calculator Work?

The calculator uses the fundamental voltage equation:

Where:

• \( V \) — Voltage in volts (V)
• \( E \) — Energy in joules (J)
• \( Q \) — Charge in coulombs (C)

Explanation: This equation shows that one volt equals one joule of energy per coulomb of charge.

3. Importance of Voltage Calculation

Details: Understanding voltage is essential for designing electrical circuits, selecting appropriate components, and ensuring safe operation of electrical systems.

4. Using the Calculator

Tips: Enter energy in joules and charge in coulombs. Both values must be positive numbers. The calculator will compute the voltage in volts.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between voltage and current?
A: Voltage is the potential difference (energy per charge), while current is the flow rate of charge (charge per time).

Q2: What are common voltage levels?
A: Common voltages include 1.5V (batteries), 5V (USB), 12V (car systems), 120V/240V (household), and higher for transmission lines.

Q3: How is voltage measured in practice?
A: Typically measured with a voltmeter connected in parallel across the component or points of interest.

Q4: Can voltage exist without current?
A: Yes, voltage is a potential difference that can exist without current flow (open circuit).

Q5: What is the relationship between voltage, current, and resistance?
A: Ohm's Law: V = I × R, where V is voltage, I is current, and R is resistance.