Capacitors and Capacitance

What is the purpose of a capacitor in an electronic circuit?

• To store and release electrical energy

• To amplify electrical signals

• To convert AC to DC power

• To regulate voltage in a circuit

What are the two main types of capacitors?

• polyester capacitors and electrolytic capacitors

• aluminum capacitors and paper capacitors

• electrolytic capacitors and ceramic capacitors

• tantalum capacitors and film capacitors

What is the formula for calculating capacitance?

• C = Q/I

• C = I/V

• C = Q/V

• C = V/Q

What is the unit of capacitance?

• Ohm

• Volt

• Ampere

• Farad

What is the role of dielectric materials in capacitors?

• Dielectric materials in capacitors act as conductors.

• Dielectric materials in capacitors act as insulators.

• Dielectric materials in capacitors increase the capacitance.

• Dielectric materials in capacitors store electrical energy.

Which type of capacitor has the highest capacitance per unit volume?

• electrolytic capacitor

• tantalum capacitor

• film capacitor

• ceramic capacitor

What is the formula for calculating the capacitance of a parallel plate capacitor?

• C = (ε₀ * A) * d

• C = (ε₀ / A) * d

• C = (ε₀ * A) + d

• C = (ε₀ * A) / d

What happens to the capacitance of a parallel plate capacitor when the distance between the plates is increased?

• The capacitance decreases.

• The capacitance increases.

• The capacitance becomes zero.

• The capacitance remains the same.

What happens to the capacitance of a parallel plate capacitor when a dielectric material is inserted between the plates?

• The capacitance becomes zero.

• The capacitance increases.

• The capacitance remains the same.

• The capacitance decreases.

What is the effect of increasing the area of the plates on the capacitance of a parallel plate capacitor?

• The capacitance becomes zero.

• The capacitance remains the same.

• The capacitance decreases.

• The capacitance increases.