Question 1

The oil-filled capacitor is made with two metal foil plates separated by ____.&#10;A) ceramic&#10;B) paper&#10;C) glass&#10;D) wood

Accepted Answer

Oil-filled capacitors use paper as the dielectric material between the metal foil plates, which is then impregnated with oil to enhance its electrical properties.

Question 2

Which of the following is not a factor in determining how much capacitance a capacitor will have?&#10;A) The surface area of the plates&#10;B) The distance between the plates&#10;C) The weight of the plates&#10;D) The type of dielectric material used between the plates

Accepted Answer

The weight of the plates is not a factor in determining capacitance. The factors that do affect capacitance are the surface area of the plates, the distance between the plates, and the type of dielectric material used between the plates.

Question 3

A capacitor can be made by separating two metal plates with a conducting material.

Accepted Answer

A capacitor is made by separating two metal plates with an insulating material (dielectric), not a conducting material. Conducting material would allow charge to flow between the plates, preventing the capacitor from storing electrical energy.

Question 4

Capacitors can be tested for a short with a voltmeter.

Accepted Answer

A voltmeter measures voltage, not continuity or shorts. A capacitor can be tested for a short with an ohmmeter or a continuity tester.

Question 5

____ and common digital meters do not supply enough voltage to test the dielectric at rated voltage.&#10;A) Multimeters&#10;B) Ammeters&#10;C) Ohmmeters&#10;D) Voltmeters

Accepted Answer

Ohmmeters and common digital meters do not supply enough voltage to test the dielectric at rated voltage because they are designed to measure resistance and electrical potential, respectively, not to apply high voltage stress tests to materials or components.

Question 6

Capacitors are rated in units called the ____.&#10;A) farad&#10;B) henry&#10;C) coulomb&#10;D) hertz

Accepted Answer

Capacitors are rated in units called farad.

Question 7

The current of a capacitive circuit is in direct opposition to the current of an inductive circuit.

Accepted Answer

This is because the current in a capacitive circuit leads the voltage while the current in an inductive circuit lags behind the voltage, resulting in opposite phase angles and direct opposition.

Question 8

The ____ is designed to be used for a short period of time only.&#10;A) oil-filled capacitor&#10;B) AC electrolytic capacitor&#10;C) capacitor&#10;D) vacuum variable capacitor

Accepted Answer

AC electrolytic capacitors are designed to be used for a short period of time only. They are used mainly in power supplies, where their ability to store large amounts of charge for short durations is useful for filtering and smoothing voltage outputs. Oil-filled capacitors, vacuum variable capacitors, and regular capacitors do not necessarily have a limited lifespan and can be used for longer periods of time if properly rated and maintained.

Question 9

The energy of a capacitor is stored in the dielectric.

Accepted Answer

The energy of a capacitor is stored in the electric field between the plates, which is partially located in the dielectric material.

Question 10

Capacitors have the ability to supply an almost infinite amount of current.

Accepted Answer

The answer of Capacitors have the ability to supply an...

Deck 8: Capacitance