Answer:
, Attractive
, Repulsive
Step-by-step explanation:
= -20 μC
= 50 μC
r = Distance between the charges = 2.5 cm
k = Coulomb constant =
Electrical force is given by
The magnitude of force each sphere will experience is
Since the charges have opposite charges they will attract each other.
Now the charges are brought into contact with each other so the resultant charge will be
The magntude of the force the spheres experience will be
The spheres have the same charge now so they will repel each other.