Figure 23-36 shows a section of a long, thin-walled metal tube of radius R = 4.84 cm, with a charge per unit length λ = 4.49 x 10-8 C/m. What is the magnitude (in N/C) E of the electric field at radial distance (a)r = 1.21 cm and (b)r = 6.53 cm.

 

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