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 ro = 6.0 cm. The charge per unit length is −7.0×10−6 C/m on the inner shell and 5.0×10−6 C/m on the outer shell. What is the magnitude of the electric field at a radius r = 4.0 cm ? 3.1×106 N/C. 2.3×106 N/C. 7.9×107 N/C. −6.3×106 N/C.

Two long, charged, thin-walled, concentric cylindrical shells have radii of ri = 3.0 cm and ro = 6.0 cm. The charge per unit length is −7.0×10−6 C/m on the inner shell and 5.0×10−6 C/m on the outer shell. What is the magnitude of the electric field at a radius r = 4.0 cm ? 3.1×106 N/C. 2.3×106 N/C. 7.9×107 N/C. −6.3×106 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_{o} = 6.0 c m

. The charge per unit length is

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

on the inner shell and

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

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

r = 4.0 c m

?

3.1 \times 10^{6} N / C

.

2.3 \times 10^{6} N / C

.

7.9 \times 10^{7} N / C

.

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

.

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