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The cross section of a long coaxial cable is shown in the figure, with radii as given. The linear charge density on the inner conductor is −30 nC/m and the linear charge density on the outer conductor is −70 nC/m. The inner and outer cylindrical surfaces are respectively denoted by A, B, C, and D, as shown. (ε0 = 8.85×10−12 C2/N⋅m2) The radial component of the electric field at a point that 34 mm from the axis is closest to A) −16,000 N/C. B) +16,000 N/C. C) −37,000 N/C. D) +37,000 N/C. E) zero.

The cross section of a long coaxial cable is shown in the figure, with radii as given. The linear charge density on the inner conductor is −30 nC/m and the linear charge density on the outer conductor is −70 nC/m. The inner and outer cylindrical surfaces are respectively denoted by A, B, C, and D, as shown. (ε0 = 8.85×10−12 C2/N⋅m2) The radial component of the electric field at a point that 34 mm from the axis is closest to A) −16,000 N/C. B) +16,000 N/C. C) −37,000 N/C. D) +37,000 N/C. E) zero.

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  1. The cross section of a long coaxial cable is shown in the figure, with radii as given. The linear charge density on the inner conductor is − 30 n C / m and the linear charge density on the outer conductor is − 70 n C / m . The inner and outer cylindrical surfaces are respectively denoted by A , B , C , and D , as shown. ( ε 0 = 8.85 × 10 − 12 C 2 / N ⋅ m 2 ) The radial component of the electric field at a point that 34 m m from the axis is closest to A) − 16 , 000 N / C . B) + 16 , 000 N / C . C) − 37 , 000 N / C . D) + 37 , 000 N / C . E) zero.

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