Welcome to the Quiz!
This quiz contains 14 questions from a mix of 1 subtopics.
What is a capacitor?
a device that generates electricity
a device that measures electric current
a device that stores electric charge
a device that conducts electricity
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What is the unit of capacitance?
watt
volt
coulomb
farad
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What happens when a capacitor is connected to a power source?
it heats up
it cools down
it discharges
it stores charge on its plates
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If the area of each plate of a parallel plate capacitor is 0.01 m2, the distance between the plates is 1 mm, and the relative permittivity of the dielectric is 3.0, what is the capacitance of the capacitor?
2.66 x 10-11 F
2.66 x 10-12 F
2.66 x 10-10 F
2.66 x 10-9 F
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What happens to the capacitance of a parallel plate capacitor if the distance between the plates is increased?
it becomes zero
it decreases
it remains the same
it increases
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What is the term for the material that separates the plates of a capacitor and insulates them from each other?
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Explain how a capacitor works.
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Describe the factors that affect the capacitance of a capacitor.
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A 200 nF capacitor is replaced with one with double the plate area and half the plate separation. What is the new capacitance?
200 nF
800 nF
50 nF
100 nF
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A capacitor with plates of area 0.05 m² is separated by 2 mm with a dielectric material that has a relative permittivity of 2.5. Calculate the capacitance of this capacitor.
2.22 x 10-11 F
1.11 x 10-10 F
5.53 x 10-10 F
1.11 x 10-10 F
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What is the capacitance of a parallel plate capacitor with an area of 0.02 m², separated by a distance of 5 mm, and no dielectric material is inserted?
3.54 x 10⁻¹⁰ F
3.54 x 10⁻⁹ F
3.54 x 10⁻¹¹ F
3.54 x 10⁻¹² F
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Calculate the charge a capacitor can store if it has a capacitance of 5 x 10⁻⁶ F and is connected across a 12 V battery.
6 x 10⁻⁶ C
6 x 10⁻⁴ C
6 x 10⁻⁷ C
6 x 10⁻⁵ C
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A capacitor stores a charge of 1.5 x 10-4 C when connected to a 10 V power source. What is its capacitance?
15 x 10⁻⁶ F
1.5 x 10⁻⁴ F
1.5 x 10⁻⁵ F
15 x 10⁻⁵ F
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If the distance between the plates of a parallel plate capacitor is halved and the area of the plates is doubled, how does the capacitance change assuming the dielectric constant remains constant?
the capacitance is halved.
the capacitance is doubled.
the capacitance remains unchanged.
the capacitance is quadrupled.
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