Imagine a single charge q placed on one corner of a square, and ...

[student77]

Imagine a single charge q placed on one corner of a square, and that the electric field at the center of the square is F/q. If additional equal charges are placed on the other three corners,
 
  the electric field at the center of the square due to these four equal charges is
  A) F/q.
  B) 4F/q.
  C) F/(2q).
  D) F/(4q).
  E) none of the above

Question 2

Electric potential, measured in volts, is the ratio of electric energy to the amount of electric
 
  A) current.
  B) resistance.
  C) charge.
  D) voltage.
  E) none of the above

[aliotak]

Answer to Question 1

Answer: E

Answer to Question 2

Answer: C