The resistance of an object is defined as A) ...

[stock]

The resistance of an object is defined as
 
  A) (length)/(resistivity)(cross-sectional area).
  B) (current)/(voltage).
  C) (voltage)/(current).
  D) (length)(resistivity)(cross-sectional area).
  E) (voltage)(current).

Question 2

A proton and electron are separated by 3.5 nm.
 
  (a) What is the magnitude of the force on the electron?
  (b) What is the magnitude of the force on the proton?
  (c) What is the electric field of the proton at the electron position?

[chevyboi1976]

Answer to Question 1

C

Answer to Question 2

(a) 19. pN
(b) 19. pN
(c) 1.2  108 N/C away from proton