Parallel Plate Capacitors

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Physics, Science, Engineering
•
11th Grade - University
•
Hard
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7 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the equation for the capacitance of a parallel plate capacitor in a vacuum?
Capacitance equals the electric permittivity of free space times the area of one plate divided by the distance between the plates.
Capacitance equals the surface charge density divided by the electric permittivity of free space.
Capacitance equals the charge divided by the electric field.
Capacitance equals the electric field times the distance between the plates.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the primary function of a dielectric in a capacitor?
To allow current to flow between the plates.
To increase the capacitance by reducing the electric field.
To decrease the capacitance of the capacitor.
To increase the distance between the plates.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How does a dielectric affect the electric field in a capacitor?
It increases the electric field.
It has no effect on the electric field.
It reduces the electric field.
It reverses the direction of the electric field.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What does the dielectric constant represent?
The ratio of the electric permittivity of the dielectric to the electric permittivity of free space.
The amount of charge a dielectric can hold.
The distance between the plates of a capacitor.
The strength of the electric field in a vacuum.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How is the dielectric constant calculated using electric fields?
By dividing the electric field with a dielectric by the electric field in a vacuum.
By multiplying the electric field with a dielectric by the electric field in a vacuum.
By dividing the electric field in a vacuum by the electric field with a dielectric.
By adding the electric field with a dielectric to the electric field in a vacuum.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the relationship between capacitance with a dielectric and capacitance with a vacuum?
Capacitance with a dielectric is half of the capacitance with a vacuum.
Capacitance with a dielectric is the same as capacitance with a vacuum.
Capacitance with a dielectric is the dielectric constant times the capacitance with a vacuum.
Capacitance with a dielectric is the square of the capacitance with a vacuum.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What happens to the capacitance of a capacitor when a dielectric is added?
The capacitance decreases.
The capacitance remains the same.
The capacitance increases.
The capacitance becomes zero.
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