Capacitor

What is a capacitor?

• An electric device consisting of two conductors separated by an insulating medium

• A device used to generate electricity

• A device used to store magnetic field

• An electric device consisting of two conductors separated by a conducting medium

What is the constant called that represents the ratio of charges to potential difference in a capacitor?

• Ampere's constant

• Ohm's law

• Capacitance

• Coulomb's constant

What are the three types of generally used capacitors?

• A parallel plate capacitor, a rectangular capacitor, a cylindrical capacitor

• A cylindrical capacitor, a spherical capacitor, a rectangular capacitor

• A parallel plate capacitor, a cylindrical capacitor, a spherical capacitor

• A rectangular capacitor, a spherical capacitor, a parallel plate capacitor

What are substances called that can sustain an electric field but act as an insulator?

• Conductors

• Semiconductors

• Dielectric

• Insulators

What is the equation for the capacitance of a parallel plate capacitor?

• C = εoA/d^2

• C = εoA*d^2

• C = εoA/d

• C = εoA*d

What is the expression for the capacitance of a cylindrical capacitor?

• C = πεl/ln(a/b)

• C = 2πεl/ln(a/b)

• C = 2πεl/ln(b/a)

• C = πεl/ln(b/a)

What is the equivalent series capacitance when three capacitors are connected in series?

• C = C1 - C2 - C3

• C = C1 * C2 * C3

• C = 1/(1/C1 + 1/C2 + 1/C3)

• C = C1 + C2 + C3

What is the equivalent capacitance when three capacitors are connected in parallel?

• C = C1 - C2 - C3

• C = C1 * C2 * C3

• C = 1/(1/C1 + 1/C2 + 1/C3)

• C = C1 + C2 + C3

What is the unit of capacitance?

• Volts

• Farads

• Ohms

• Amps

What is the function of a dielectric in a capacitor?

• To increase the capacitance

• To decrease the capacitance

• To increase the voltage

• To decrease the voltage