Understanding Capacitors and DC Current

A capacitor is used to __ electrical energy in an electric field.

The capacitance of a parallel plate capacitor is directly proportional to the area of the __.

In a DC circuit, a capacitor initially allows current to flow until it is fully __.

The unit of capacitance is __.

The insulating material between the plates of a capacitor is called the __.

What is the function of a capacitor in a circuit?

• Convert AC to DC

• Store energy

• Increase voltage

• Reduce current

The capacitance of a parallel plate capacitor is inversely proportional to:

• The distance between the plates

• The area of the plates

• The dielectric constant

• The thickness of the plates

What happens when a capacitor is fully charged in a DC circuit?

• It continues to allow current to flow

• It stops allowing current to flow

• It discharges immediately

• It increases its capacitance

In a parallel plate capacitor, increasing the plate area will:

• Decrease the capacitance

• Increase the capacitance

• Have no effect on capacitance

• Decrease the voltage

As a capacitor is fully charged, the voltage across the device is

• lower than that of the battery connected to it

• equal to the voltage of the battery connected to it

• higher than that of the battery connected to it

• none of the previous