B) What is the magnitude E1 of the electric field E at radius r= 12.7cm , just o
ID: 1281535 • Letter: B
Question
B) What is the magnitude E1 of the electric field E at radius r= 12.7cm , just outside the inner sphere?
C) What is the magnitude of E? at r= 14.5cm , just inside the outer sphere?
please answer in 20 mins
A spherical capacitor is formed from two concentric spherical conducting shells separated by vacuum. The inner sphere has a radius of ra = 12.3cm , and the outer sphere has a radius of rB = 15.0cm . A potential difference of 120V is applied to the capacitor. B) What is the magnitude E1 of the electric field E at radius r= 12.7cm , just outside the inner sphere? C) What is the magnitude of E? at r= 14.5cm , just inside the outer sphere? please answer in 20 minsExplanation / Answer
Capacitance of spherical capacitor is = 4pieo( ab/b-a)
C = 4*3.14* 8.85e-12*(0.124*0.148)/(0.148-0.124)
C = 85 pF
charge Q = CV
Q = 85e-12 * 120
Q = 10.2 nC
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E = Kq/r^2
E = 9e9 *10.2e-9/*0.127^2
E = 5.691*10^3 N/C
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E = 9e9*10.2e-9/(0.145^2)
E = 4.366*10^3 N/C
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