Positive charge Q is placed on a conducting spherical shell with inner radius R1 and outer radius R2.A particle with charge q is placed at the center of the cavity.The magnitude of the electric field at a point in the cavity, a distance r from the center, is:
A)
B)
C) q/4 0r2
D) (q + Q) /4 0r2
E)
Correct Answer:
Verified
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