A spherical, non-conducting shell of inner radius r1 = 10 cm and ...

[mynx]

A spherical, non-conducting shell of inner radius r1 = 10 cm and outer radius r2 = 15 cm carries a total charge Q = 15 C distributed uniformly throughout the volume of the shell.
 
  What is the magnitude of the electric field at a distance r = 12 cm from the center of the shell? (k = 1/40 = 8.99  109 N  m2/C2) A) 5.75  103 N/C
  B) zero
  C) 2.87  106 N/C
  D) 5.75  106 N/C
  E) 2.87  103 N/C

Question 2

Which of the following is not one of the four fundamental forces in nature?
 
  A) frictional force
  B) strong nuclear force
  C) electromagnetic force
  D) gravitational force
  E) weak nuclear force

[BUTTHOL369]

Answer to Question 1

C

Answer to Question 2

A

[mynx]

Excellent

[milbourne11]

Gracias!