A non-conducting sphere of radius R = 5.0 cm carries a charge Q =3.0 mC distributed uniformly throughout its volume. At what distance, measured from the centre of the sphere, does the electric field reach a value equal to half of its maximum value?

A) 7.1 cm only.

B) 2.5 cm and 7.1 cm.

C) 3.5 cm only.

D) 2.5 cm and 3.5 cm.

E) 2.5 cm only.

Question

A solid insulating sphere of radius a = 5.00 cm carries a net positive charge of Q = 3.00 μC uniformly distributed throughout its volume. Concentric with this sphere is a conducting spherical shell with inner radius b = 10.0 cm and outer radius c = 15.0 cm as shown in Figure P24.54, having net charge q = −1.00 μC. Prepare a graph of the magnitude of the electric field due to this configuration versus r for 0 < r < 25.0 cm.

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