1.

Three concentric spherical shells of radii R1, R2, R3 (R1 < R2 < R3) carry charges 1, 2 and 4 coulombs, respectively. The charge in coulombs on the inner and outer surfaces respectively, of the outermost shell is

A. 0 and 4
B. 3 and 1
C. 3 and 7
D. 2 and 6
Answer» C. 3 and 7


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