Two-charged-concentric-spheres-have-radii-of-10cm-and-18cm-The-charge-on-the-inner-sphere-is-6-0-10-8-C-and-that-on-the-outer-sphere-is-2-0-10-8-C-Find-the-electric-field-i-at-r-12cm-and-ii-at

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Question Number 39794 by NECx last updated on 11/Jul/18

$$Twochargedconcentricspheres$$$$haveradiiof10cmand18cm.The$$$$chargeontheinnersphereis$$$$6.0\times {10}^{-8}Candthatontheouter$$$$sphereis2.0\times {10}^{-8}C.Findthe$$$$electricfield\left(i\right)atr=12cmand$$$$\left(ii\right)atr=25cm$$$$$$$$$$

Answered by tanmay.chaudhury50@gmail.com last updated on 11/Jul/18

$$i)E.4\mathrm{\Pi }{r}^2=\frac{q}{{ϵ}_0}r=12\times {10}^{-2}andq=6.0\times {10}^{-8}C$$$$E=9\times {10}^9\times \frac{6.0\times {10}^{-8}}{{\left(12\times {10}^{-2}\right)}^2}=0.375\times {10}^5$$$$ii)E=9\times {10}^9\times \frac{8\times {10}^{-8}}{{\left(25\times {10}^{-2}\right)}^2}=0.1152\times {10}^5$$$$plscheck$$

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