Capacitors and Capacitance

Capacitors are essential components in electrical circuits that store and release electrical energy. Capacitance is the measure of a capacitor's ability to store charge.

Capacitance Formula

The formula for capacitance is:


C = Q / V

Where:

C is the capacitance (in farads)
Q is the charge (in coulombs)
V is the voltage (in volts)

Understanding Capacitors

Capacitors consist of two conductive plates separated by an insulating material called a dielectric. When a voltage is applied, charge accumulates on the plates, creating an electric field.

Example Calculation

Consider a capacitor with a charge of 6 coulombs and a voltage of 3 volts:


C = Q / V
C = 6C / 3V
C = 2F

Applications of Capacitors

Capacitors are used in:

Filtering signals
Storing energy
Timing circuits
Power conditioning

Practice Problems

Calculate the capacitance of a capacitor with a charge of 10 coulombs and a voltage of 5 volts.
Determine the charge stored in a capacitor with a capacitance of 4 farads and a voltage of 2 volts.

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