Lines of charge: 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
and the linear charge density on the outer conductor is
The inner and outer cylindrical surfaces are respectively denoted by A, B, C, and D, as shown.
The magnitude of the electric field at a point that is
from the axis is closest to 
A) 17,000 N/C.
B) 15,000 N/C.
C) 13,000 N/C.
D) 11,000 N/C.
E) 9600 N/C.
Correct Answer:
Verified
Q21: Spheres of charge: A solid nonconducting sphere
Q22: Sheets of charge: Two extremely large nonconducting
Q23: Charge on conductors: A neutral hollow spherical
Q24: Sheets of charge: As shown in the
Q25: Sheets of charge: A huge (essentially infinite)
Q27: Spheres of charge: A spherical, non-conducting shell
Q28: Sheets of charge: Consider two closely spaced
Q29: Sheets of charge: A very large sheet
Q30: Lines of charge: An infinitely long nonconducting
Q31: Charge on conductors: A hollow conducting spherical
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