A conducting spherical shell contains a smaller concentric solid conducting sphe

Question

A conducting spherical shell contains a smaller concentric solid conducting sphere. The inner sphere carries a negative charge, and the outer sphere carries a positive charge of equal total magnitude. (a) Is there an electric field inside the inner sphere? (b) Is there an electric field outside the outer sphere? (c) Describe the nature of the electric field between the two spheres. (I know that a) and b) are No, but I need help describing the nature of the electric field between the two spheres which is part c).

Explanation / Answer

a) their is no electric field as no charge is enclosed

b) No because the total charge inside the gaussian surface = 0. So E=0

c) between the spheres the field will be only accordong to the inner solid sphere
EA = Q/

E = Q/A

A = 4r^2

E =  Q/(4r^2), towards the sphere of negative r = the distance from the centre of the inner sphere charge

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