A solid nonconducting sphere (radius = 12 cm) has a charge of ...

[olgavictoria]

A solid nonconducting sphere (radius = 12 cm) has a charge of uniform density (30 nC/m3) distributed throughout its volume. Determine the magnitude of the electric field 15 cm from the center of the sphere.
 a. 22 N/C
  b. 49 N/C
  c. 31 N/C
  d. 87 N/C
  e. 26 N/C

Question 2

Charge of uniform density (40 pC/m2) is distributed on a spherical surface (radius = 1.0 cm), and a second concentric spherical surface (radius = 3.0 cm) carries a uniform charge density of 60 pC/m2 . What is the magnitude of the electric field at a point 4.0 cm from the center of the two surfaces?
 a. 3.8 N/C
  b. 4.1 N/C
  c. 3.5 N/C
  d. 3.2 N/C
  e. 0.28 N/C

[Mollythedog]

Answer to Question 1

D

Answer to Question 2

B