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A solid conducting sphere of radius 2.00 cm has a charge 9.70 µC. A conducting spherical shell of inner radius 4.00 cm and outer radius 5.00 cm is concentric with the solid sphere and has a charge -2.50 µC. Find the electric field at the folowing radii from the center of this charge configuration. Note that the field is positive when directed radially outward and negative when directed radially inward.
(a) r = 1.00 cm
N/C
(b) r = 3.00 cm
N/C
(c) r = 4.50 cm
N/C
(d) r = 7.00 cm
N/C
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