2 long charged concentric cylinders have radii of 3.22cm and 6.18cm. Surface charge densit of the inner cylinder is 2.41 micro C / m^2 and outer cylinger is -18.0microC/ m^2. Find electric field at r = 4.10cm (r is the radius as taken from the central axid of these two concetric cylinders)(adsbygoogle = window.adsbygoogle || []).push({});

i worked it out and got E = 2 k (2.41 x 10^-6)/ (0.041) = 1.06x 10^6N/C

am i right ?

the book gives an answer that is 2.12 MN/C

so who i right me or the book?

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# Homework Help: Electric field due to concentric cylinders

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