Final answer:
Objects with different charges attract each other due to the forces described by Coulomb's Law. When charged spheres are brought into contact, their charges redistribute equally upon separation. Understanding electrostatic interactions between charges is key in physics.
Step-by-step explanation:
When objects with different charges are brought together, they attract each other. This is a foundational concept in electrostatics, where Coulomb's Law indicates that unlike charges will exert an attractive force on each other. Hence, when objects with different charges are in proximity, an electrostatic attraction occurs.
For example, considering two charged metal conducting spheres on insulating stands, sphere A with a charge of −5 nC and sphere B with a charge of −3 nC. When these two differently charged spheres are brought into contact, the charges redistribute so that they reach an equilibrium. This means that the total charge of −8 nC would be shared equally between the two spheres when separated, leaving each sphere with a new charge of −4 nC.
Whenever two objects with different electric charges come into contact and then are separated, the final charge on each object is a result of the redistribution of the total charge equally between the objects. Therefore, the concept of attractive forces between opposite charges is essential in understanding how electric charges interact in different materials and situations.