Two long, charged, thin-walled, concentric cylindrical shells have rad

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Two long, charged, thin-walled, concentric cylindrical shells have radii of ri = 3.0 cm and r0 = 6.0 cm. The charge per unit length is 5.0×10−6 C/m on the inner shell and −7.0×10−6 C/m on the outer shell. What is the electric field at a radius r = 12 cm? Take the field to be positive if radially outward and negative if radially inward. 3.0×105 N/C. 1.8×106 N/C. −1.8×106 N/C. −3.0×105 N/C.

Two long, charged, thin-walled, concentric cylindrical shells have radii of ri = 3.0 cm and r0 = 6.0 cm. The charge per unit length is 5.0×10−6 C/m on the inner shell and −7.0×10−6 C/m on the outer shell. What is the electric field at a radius r = 12 cm? Take the field to be positive if radially outward and negative if radially inward. 3.0×105 N/C. 1.8×106 N/C. −1.8×106 N/C. −3.0×105 N/C.

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Two long, charged, thin-walled, concentric cylindrical shells have radii of

r_{i} = 3.0 c m

and

r_{0} = 6.0 c m

. The charge per unit length is

5.0 \times 10^{- 6} C / m

on the inner shell and

- 7.0 \times 10^{- 6} C / m

on the outer shell. What is the electric field at a radius

r = 12 c m

? Take the field to be positive if radially outward and negative if radially inward.

3.0 \times 10^{5} N / C

.

1.8 \times 10^{6} N / C

.

- 1.8 \times 10^{6} N / C

.

- 3.0 \times 10^{5} N / C

.

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