1. What is Voltage Across Capacitor?

The voltage across a capacitor is the potential difference between its plates, determined by the amount of charge stored and the capacitor's capacitance. It follows the fundamental relationship V = Q/C.

2. How Does the Calculator Work?

The calculator uses the voltage formula:

Where:

• \( V \) — Voltage across capacitor (volts)
• \( Q \) — Charge stored (coulombs)
• \( C \) — Capacitance (farads)

Explanation: This equation shows that voltage is directly proportional to the charge stored and inversely proportional to the capacitance.

3. Importance of Voltage Calculation

Details: Calculating voltage across capacitors is essential for circuit design, energy storage analysis, and ensuring components operate within their rated voltage limits to prevent damage.

4. Using the Calculator

Tips: Enter charge in coulombs and capacitance in farads. Both values must be positive numbers greater than zero for accurate calculation.

5. Frequently Asked Questions (FAQ)

Q1: What happens if voltage exceeds capacitor rating?
A: Exceeding the voltage rating can cause dielectric breakdown, leading to capacitor failure and potential circuit damage.

Q2: How does voltage relate to energy stored?
A: Energy stored in a capacitor is given by E = ½CV², showing that energy increases with the square of the voltage.

Q3: Can voltage be negative?
A: Voltage is a scalar quantity but can have negative polarity depending on the charge distribution and reference point.

Q4: How does series/parallel affect voltage?
A: In series, voltage divides across capacitors. In parallel, all capacitors have the same voltage but different charges.

Q5: What units should I use?
A: Use consistent SI units - coulombs for charge and farads for capacitance to get volts as result.