Capacitance

Define capacitance.

The ability to store electrical charge (unit: Farad).

What is the formula for charge stored in a capacitor?

(Q = CV) (Charge = Capacitance × Voltage).

How do you calculate total capacitance for capacitors in series?

1/Ct = 1/C1 + 1/C2 + …

How do you calculate total capacitance for capacitors in parallel?

Ct= C1 + C2 + …

Why are electrolytic capacitors polarized?

Their dielectric is formed chemically—reverse voltage can destroy them.

Name two dangers of capacitors.

High-voltage discharge, explosion risk if misconnected.

Three capacitors (2µF, 4µF, 6µF) are in series. Find total capacitance.

1/Ct = 1/2+ 1/4+ 1/6 = Ct = 1.09µF

A 10µF capacitor charged to 100V stores what energy?

W = ½ CV² = 0.5 × 10 × 10µF x 100² =0.05J.