A conducting sphere is placed within a conducting spherical shell as shown in th

Question

A conducting sphere is placed within a conducting spherical shell as shown in the figure below. The conductors are in electrostatic equilibrium. The inner sphere has a radius of 1.50 cm, the inner radius of the spherical shell is 2.25 cm, and the outer radius of the shell is 2.75 cm. The inner sphere has a charge of 235 nC, and the spherical shell has zero net charge.

(a) What is the magnitude of the electric field at a point 1.75 cm from the center?


______ N/C

(b) What is the electric field magnitude at a point 2.50 cm from the center? [Hint: What must be true about the electric field inside a conductor in electrostatic equilibrium?]


_______ N/C

(c) What is the electric field magnitude at a point 3.60 cm from the center?
______ N/C

Explanation / Answer

a. 9x10^-9 x 265nC/ (1.75)^2 x 10^-4 b. Zero c. 9x10^-9 x 265nC/ (3.7)^2 x 10^-4

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