Topic 6: Capacitor

What is a capacitor?

• An electronic device that stores energy in a magnetic field.

• An electronic device that stores energy in an electric field.

• An electronic device that stores energy in a gravitational field.

What happens when there is a current through a capacitor?

• Electrons accumulate on both plates.

• Electrons are removed from both plates.

• Electrons accumulate on one plate and are removed from the other plate.

What is the formula for the charge stored in a capacitor?

• Q = CV

• Q = IC

• Q = VE

What is capacitance?

• The ability of a capacitor to store energy.

• The ability of a capacitor to resist current flow.

• The ability of a capacitor to generate a magnetic field.

What is the unit used to measure capacitance?

• Ohm

• Farad

• Volt

What is the dielectric material used in capacitors?

• Insulating material that separates two metal plates.

• Conductive material that connects two metal plates.

• Magnetic material that stores energy.

What is the difference between a fixed capacitor and a variable capacitor?

• A fixed capacitor has a fixed value of capacitance while a variable capacitor can vary its capacitance.

• A fixed capacitor can block DC current while a variable capacitor cannot.

• A fixed capacitor has a smaller capacitance compared to a variable capacitor.

What is the capacitance number code used on small capacitors?

• The first two numbers indicate the capacitance value and the third number indicates the number of zeros.

• The first two numbers indicate the voltage rating and the third number indicates the capacitance value.

• The first two numbers indicate the tolerance and the third number indicates the capacitance value.

What is the working voltage of a capacitor?

• The minimum voltage that can be applied to the capacitor.

• The maximum voltage that can be applied to the capacitor without failure.

• The voltage that is stored in the capacitor.

What happens when capacitors are connected in series?

• The total capacitance decreases.

• The total capacitance increases.

• The total capacitance remains the same.