I\'ve Already got #3 correct and I need help on #4. For #3, my answer was 2823.5

Question

I've Already got #3 correct and I need help on #4.

For #3, my answer was 2823.5187

Some of the answer than I have tried for #4 that have been incorrect have been 2.24688*10^5 and 31.933

003 (part 1 of 2) 10.0 points A uniformly charged, straight filament 8 m in length has a total positive charge of 10 C. An uncharged cardboard cylinder 2 cm in length and 9 cm in radius surrounds the filament using the filament as its axis of symmetry, with the filament as the central axis of the cylinder Find the total electric flux through the cylinder. The permittivity of free space is 8.8542 × 10-12 C2/N·m 2 . Answer in units of N m2/C. 004 (part 2 of 2) 10.0 points What is the electric field at the surface of the cylinder? Answer in units of V/m.

Explanation / Answer

here by using the formula

E = 2 * k * lambda / r

E = 2 * k * q / (L * r)

E = 2 * 8.99 * 10^9 * 10 * 10^-6 / ( 8 * 0.09)

E = 2.49 * 10^5 V/m

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