Question

Two long, charged, thin-walled, concentric cylinders have radii of 3.0 and 6.0 cm. The charge per unit length is 4.9 ✕ 10^{- 6} C/m on the inner shell and -8.5 ✕ 10^-6 C/m on the outer shell.

(a) Find the magnitude and direction of the electric field at radial distance r = 4.9 cm from the common central axis. (Take radially outward to be positive.)

__________ N/C

(b) Find the magnitude and direction of the electric field at r = 7.4 cm, using the same sign convention.

___________N/C

Answer 1

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4-9-8-5)x1 0.874 KU9 s 1