alleryStart learning →Which expression gives the capacitance of a spherical capacitor with inner radius a and outer radius b?
A4 pi e0 (b - a)/ab
B4 pi e0 ab/(b - a)
C4 pi e0 (a + b)
D2 pi e0 ab/(a + b)
Answer & Solution
Correct answer: B. 4 pi e0 ab/(b - a)
Integrating the radial field between the shells gives C = 4 pi e0 ab/(b - a).
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