Multiple-Choice Homework Problem 3.8 The figure to the right shows two charged s

Question

Multiple-Choice Homework Problem 3.8 The figure to the right shows two charged spherical shells. The inner shell has radius a and charge density oa o. The outer shell has radius b and charge density ob +20. Calculate the electric field in Region II between the two shells (a r b). Select One of the Following: (a) 0 (b) (c) (d) (e) (f) Multiple-Choice Homework Problem 3.9 Two infinite parallel planes of charge with uniform surface charge densities are parallel to the y 2 lane and equally spaced about the origin. The planes pass through the points ticm. The plane passing through 1cmi has surface charge density o. The plane passing through 1cm has surface charge density o. The planes are drawn to the right. Compute the electric field at the origin Select One of the Following: (b) -o/2eoar (c) +a/eoir Air Air Air

Explanation / Answer

3.8)

between the two shells ,

as the electric field due to a shell inside it is zero inside the shell

hence , at the point , electric field due to outer shell will be zero

electric field in resion II , E = electric field due to inner shell

E = k * Q/r^2

E = - sigma * 4 *pi*a^2/(4 *pi*epsilon * r^2)

E = - sigma * 4 *pi*a^2/(4 *pi*epsilon * r^2)

hence , the correct option is (d)

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