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LonghornDude8
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Homework Statement
The figure shows a portion of an infinitely long, concentric cable in cross section. The inner conductor carries a charge of 5.1 nC/m and the outer conductor is uncharged.
What is the electric field 1.9 cm from the central axis? The permittivity of free space is 8.85419e-12 C2/Nm2.
Answer in units of N/C.
The picture:
inner cylinder has a diameter of 3.6 cm.
Outer hollowish cylinder: diameter1 = 8.2 cm; diameter2 = 10.7 cm
Homework Equations
[tex]\int EdA = Q_{ins}/\epsilon_{0}[/tex]
Area of cylinder: [tex]A=2\pi r^{2}l[/tex]
The Attempt at a Solution
Doing a little bit of algebra, I got the formula: [tex]\lambda/2\pi r\epsilon_{0}[/tex] and got the answer 4824.9 N/C.
I googled part of the question and saw that the way I solved it was right (my equation) and using my equation, I got their answer, but when I do the problem with the numbers I'm given, I keep getting it wrong.
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