1. What is Charge on a Capacitor?

Definition: The charge (Q) stored on a capacitor is the product of its capacitance (C) and the voltage (V) applied across it.

Purpose: This calculator helps determine how much electric charge a capacitor can store given its specifications.

2. How Does the Calculator Work?

The calculator uses the fundamental capacitor formula:

Where:

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

Explanation: The capacitance value represents how much charge the capacitor can store per volt, and multiplying by the actual voltage gives the total stored charge.

3. Importance of Charge Calculation

Details: Knowing the charge helps in circuit design, energy storage calculations, and ensuring capacitors are used within their safe operating limits.

4. Using the Calculator

Tips: Enter the capacitance in farads (common values are often in microfarads - μF) and the voltage in volts. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What units should I use for capacitance?
A: The calculator uses farads (F), but you can enter values in microfarads (μF) by dividing by 1,000,000 (e.g., 100μF = 0.0001F).

Q2: Does this work for all capacitor types?
A: Yes, the formula applies to all capacitors (electrolytic, ceramic, film, etc.) as long as they're within their voltage ratings.

Q3: What happens if I exceed the voltage rating?
A: The capacitor may fail or even explode. Always use capacitors within their rated voltage.

Q4: How is this related to energy storage?
A: Energy stored is \( E = \frac{1}{2}CV^2 \). The charge is the foundation for this calculation.

Q5: Can I calculate capacitance if I know charge and voltage?
A: Yes, rearrange the formula: \( C = \frac{Q}{V} \).