The stored electric energy in a spherical capacitor whose inner radius a=6 cm, outer radius b=10 cm filled with a dielectric material of &=3-7 is .. Assume V(r=a)=29 V and V(r=b)=o V a. 77.79 nJ O b. 25.93 nJ O C. 129.65 nJ Od. 20.74 nJ e. 10.37 nJ f. 15.56 nJ
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