E= 3. In free space, a conductor sphere A with a radius a = 2 [m] lies in a conductor sphere B with a thickness of = 10 [cm] and an inner radius b=3 [m] with the same center as shown in Figure. If the conductor sphere A is charged with a charge of 2 [nC], find the electric field E at all points and graph El. express to B 19 A

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