1-What plate area is required if an air-filled, parallel-plate capacitor with a
ID: 2272538 • Letter: 1
Question
1-What plate area is required if an air-filled, parallel-plate capacitor with a plate separation of 3.5mm is to have a capacitance of 29pF2 What is the maximum voltage that can be applied to this capacitor without causing dielectric breakdown.
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2-IP Consider a region in space where a uniform electric field 6800N/C points in the negative x direction.
What is the distance between the +13V and the +15V equipotentials?
1-What plate area is required if an air-filled, parallel-plate capacitor with a plate separation of 3.5mm is to have a capacitance of 29pF
2
2
2 What is the maximum voltage that can be applied to this capacitor without causing dielectric breakdown.
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2-IP Consider a region in space where a uniform electric field 6800N/C points in the negative x direction.
What is the distance between the +13V and the +15V equipotentials?
2-IP Consider a region in space where a uniform electric field 6800N/C points in the negative x direction. 2-IP Consider a region in space where a uniform electric field 6800N/C points in the negative x direction. 2-IP Consider a region in space where a uniform electric field 6800N/C points in the negative x direction.
What is the distance between the +13V and the +15V equipotentials?
2
Explanation / Answer
1.
a)
C=eoA/d
=>A =Cd/eo =(29*10^-12)(3.5*10^-3)/(8.85*10^-12)
A=0.01147 m^2 or 114.7 cm^2
b)
Electric field for air break down
E=3*10^6 V/m
V=Ed =0.01147*3*10^6
V=34406.78 V or 34.4 KV
2.
E=dV/dr
dr =dV/E =(15-13)/6800
dr=2.94*10^-4 m or 0.294 mm
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