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            Conceptual Development- worksheet 32-1             solutions

 

  1. The diagram is of a hydrogen atom.

a)      Label the proton in the nucleus with a + sign.

b)      Label the electron orbiting it with a – sign.                                                  

c)      The electrical interaction between the nucleus and

the orbiting electron is a force of (attraction / repulsion).                  

 

d) According to Coulomb’s Law

F = k q1 q2

          r2

 

if the charge of either the nucleus or the orbital electron were greater, the force between the nucleus and the electron would be (greater / less), and if the distance between the nucleus and the electron were greater, the force would be (greater / less). 

 

e) If the distance between the nucleus and electron were doubled, the force would be

(1/4 as much / ˝ as much / 2 times as much / 4 times as much).

 

  1. Consider the electric force between a pair of charged particles a given distance apart.  By Coulomb’s Law:

a)      if the charge on one of the particles is doubled, the force is

(unchanged / halved / doubled / quadrupled).

 

b)      If, instead, the charge on both particles is doubled, the force is

(unchanged / halved / doubled / quadrupled).

 

c)      If, instead, the distance between the particles is halved, the force is

(unchanged / halved / doubled / quadrupled).

 

d)      If the distance is halved AND the charge of each particle is doubled, the force is

_____16______ times as great.