Question 1

1.1 State Coulomb's law in words                                        (2)

1.2 Define the following Terms

1.2.1 Electrostatics                                                                (2)

1.2.2 Polarization                                                                  (2)

Question 2

2.1 An object has charge +975nC.   

2.1.1 Has the object gained or lost electrons?                                     (1)

2.1.2 Calculate the number of electrons lost or gained.                       (3)

2.2 The above object is brought close to another one with charge of -625nC and

       the distance between two objects is 25cm.

2.2.1 State the type of electrostatic force between these two charges.      (1) 

2.2.2 Calculate the electrostatic force between the charges.                      (4)

2.2.3 What happens to the force calculated above if the distance is doubled?

         Explain your answer                 (3)

TOTAL : 18 Marks