iPad 4:25 PM webassign.net 66% 2R 2R Need Help? Read mai men i 3. 2 points SerPS

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iPad 4:25 PM webassign.net 66% 2R 2R Need Help? Read mai men i 3. 2 points SerPSET9 26.P004.MI My Notes Ask Your Te An air-filled spherical capacitor is constructed with an inner-shell radius of 7.30 cm and an outer-shell radius of 14.2 cm (a) Calculate the capacitance of the device. pF (b) What potential difference between the spheres results in a 4.00-HC charge on the capacitor? kV Need Help? -Read" l LMaster" Assignment Save Assignment Progress Home My Assignments Extension Request WebAssign 4.00 1997-2018 Advanced Instructional Systems, Inc. All rights reserved

Explanation / Answer

(A) For spherical capacitor,

C = 4 pi e0 / [1/ri - 1./r0 ]

C = (4 x pi x 8.854 x 10^-12) / [1/0.073 - 1/0.142]

C = 740.6 x 10^-12 F Or 740.6 pF ......Ans

(B) Q = C V

4 x 10^-6 = (740.6 x 10^-12) V

V= 5400 Volt

V = 5.4 kV ....Ans

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