Positive Charge Q Is Placed on a Conducting Spherical Shell $\pi$

Multiple Choice

Positive charge Q is placed on a conducting spherical shell with inner radius R₁ and outer radius R₂. A point charge q is placed at the center of the cavity. The magnitude of the electric field produced by the charge on the inner surface at a point in the interior of the conductor a distance r from the center, is:

A) 0
B)
C)
D) q/4 $\pi$$\varepsilon$ ₀r²
E) Q/4 $\pi$$\varepsilon$ ₀r²