Use the Following Scenario for the Next Question

Multiple Choice

Use the following scenario for the next question. A solid conducting sphere of radius ra is placed concentrically inside a conducting spherical shell of inner radius r_b1 and outer radius r_b2. The inner sphere carries a charge Q while the outer sphere does not carry any net charge.
-The electric field for r_b1 < r < r_b2 is

A) -kQ/r²
B) kQ/r²
C) -2kQ/r
D) 2kQ/r
E) zero