Capacitors Quiz

What is a capacitor?

• A. A device that stores mechanical energy

• B. A component that stores and releases electrical energy

• C. A component that converts electrical energy to heat

• D. A device used for measuring current

What are the main components of a capacitor?

• A. Two inductive coils

• B. A conductive plate and a resistor

• C. Two conductive plates and a dielectric

• D. A diode and a transformer

How does a capacitor store electrical energy?

• A. By converting it to heat

• B. By accumulating electric charge on its plates

• C. By generating a magnetic field

• D. By using chemical reactions

What is capacitance?

• A. The resistance of a capacitor

• B. The amount of electric charge a capacitor can store

• C. The voltage rating of a capacitor

• D. The current a capacitor can handle

How is capacitance measured?

• A. By the amount of charge stored per unit voltage

• B. By the resistance per unit area

• C. By the voltage per unit current

• D. By the magnetic field strength

What is the unit of capacitance?

• A. Ohm

• B. Volt

• C. Farad

• D. Henry

What factors affect the capacitance of a capacitor?

• A. Plate surface area, distance between plates, dielectric material

• B. Plate thickness, temperature, wire length

• C. Plate color, ambient light, humidity

• D. Resistance, inductance, magnetic field

How does a capacitor charge and discharge?

• A. By storing and releasing chemical energy

• B. By creating and destroying magnetic fields

• C. By accumulating and releasing electric charge

• D. By converting energy to heat and back

What are some common applications of capacitors?

• A. Filtering in power supplies, energy storage in flash cameras

• B. Converting AC to DC, storing mechanical energy

• C. Generating sound, amplifying signals

• D. Controlling temperature, regulating air flow

What is the difference between a capacitor and a battery?

• A. Capacitor stores energy chemically; battery stores electrically

• B. Capacitor stores energy electrically; battery stores chemically

• C. Both store energy the same way

• D. Battery releases energy quickly; capacitor slowly