- #1
mr_coffee
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Two long, charged, thin-walled, concentric cylindrical shells have radii of 3.0 and 6.0cm. The charge per unit length is 5.0x10^-6 C/m on the inner shell and -7.0x10^-6 C/m on the outer shell. What are the magnitude E and direction radially inward or outward? I figured I could use the following:
E = [itex] \delta [/itex]/2PIEoR;
I used E = 5.0x10^-6/(2PIEo)(.03)) = 2997268 inside
E = -7.0x10^-6/(2PIEo)(.06)) = -2098087 outside
I added these together and got a wrong answer... it should be
2.3x10^6 N/C and if the final answer is postive that means its outward, if its negative that means E is inward.
E = [itex] \delta [/itex]/2PIEoR;
I used E = 5.0x10^-6/(2PIEo)(.03)) = 2997268 inside
E = -7.0x10^-6/(2PIEo)(.06)) = -2098087 outside
I added these together and got a wrong answer... it should be
2.3x10^6 N/C and if the final answer is postive that means its outward, if its negative that means E is inward.