Capacitance of a capacitor

C=\dfrac{Q}{U}

Result unit: F (farad)

What it describes

The ability of a capacitor to store charge at a given voltage.

C

capacitance

[F]

Q

charge

[C]

U

voltage

[V]

Capacitance tells how much charge a capacitor stores per volt of voltage. A larger capacitance means more charge at the same voltage.

Capacitors in circuits; storing charge.

A capacitor stores 0.01 C at a voltage of 5 V. Calculate its capacitance.

Substitution

Q=0.01

U=5

Result

C=\dfrac{0.01}{5}=0.002

=2

mF.

Found this formula useful? Share it.

It's free — send it to a friend who's revising.

Teaching? Embed this formula on your site.

Free widget — paste it on your school site, blog or notes. It links to the full version.