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A metal sphere with radius 1.40 cm is supported
on an insulating stand at the center of a hollow,
metal, spherical shell with radius rb = 9.10 cm.
Charge +q is put on the inner sphere and charge
-q on the outer spherical shell. The magnitude of q
is chosen to make the potential difference between
the spheres 420 V, with the inner sphere at higher
potential.
Part A
Calculate q.
Express your answer in coulombs.
?
q =
C

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