A problem with developing capacitors that can store large amount of energy is the breakc dielectric. When the electric field in the capacitor exceeds the dielectric strength of the insulator fails and the capacitor shorts. The capacitor can be permanently damaged whe A plastic has a dielectric constant of 10 and strength 85 x106 V/m. It is formed into a filr mm and used as the separating material between two round metal discs of diameter 2 cm What is the capacitance of this capacitor?

Principles of Physics: A Calculus-Based Text
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Author:Raymond A. Serway, John W. Jewett
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Chapter20: Electric Potential And Capacitance
Section: Chapter Questions
Problem 66P: A parallel-plate capacitor in air has a plate separation of 1.50 cm and a plate area of 25.0 cm2....
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A problem with developing capacitors that can store large amount of energy is the breakdown of the
dielectric. When the electric field in the capacitor exceeds the dielectric strength of the insulator, the
insulator fails and the capacitor shorts. The capacitor can be permanently damaged when this occurs.
A plastic has a dielectric constant of 10 and strength 85 x106 V/m. It is formed into a film of thickness 0.9
mm and used as the separating material between two round metal discs of diameter 2 cm.
What is the capacitance of this capacitor?
C = 30.91
pF
What is the maximum voltage to which this capacitor can be charged?
V = 76500
If this maximum voltage is applied, how much charge and energy would be stored?
Q = 0.236
µC
U = 0.0904
J
Transcribed Image Text:A problem with developing capacitors that can store large amount of energy is the breakdown of the dielectric. When the electric field in the capacitor exceeds the dielectric strength of the insulator, the insulator fails and the capacitor shorts. The capacitor can be permanently damaged when this occurs. A plastic has a dielectric constant of 10 and strength 85 x106 V/m. It is formed into a film of thickness 0.9 mm and used as the separating material between two round metal discs of diameter 2 cm. What is the capacitance of this capacitor? C = 30.91 pF What is the maximum voltage to which this capacitor can be charged? V = 76500 If this maximum voltage is applied, how much charge and energy would be stored? Q = 0.236 µC U = 0.0904 J
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