A non-conducting sphere of radius R = 7.0 cm carries a charge Q = ...

[tth]

A non-conducting sphere of radius R = 7.0 cm carries a charge Q = 4.0 mC distributed uniformly throughout its volume. At what distance, measured from the center of the sphere, does the electric field reach a value equal to half its maximum value?
 
  A) 3.5 cm only
  B) 4.9 cm only
  C) 3.5 cm and 9.9 cm
  D) 3.5 cm and 4.9 cm
  E) 9.9 cm only

Question 2

Which of the following is the strongest fundamental force acting between microscopic particles?
 
  A) Elmer's glue
  B) electromagnetic force
  C) weak force
  D) gravity
  E) strong force

[k2629]

Answer to Question 1

C

Answer to Question 2

E

[tth]

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[k2629]

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