How objects become electrically charged

Before I start explaining, you should know these vocabulary words:
Charging by conduction- charging an object by allowing it to come into contact with an object that already has an electrical charge.

Charging by induction- charging an object without direct contact between the object and the charge.

Like charges repel each other:
This means that two positively or negatively charged objects will repel, not attract each other. The first object will exert a repulsive force on the second, and Newton's Third Law shows that the second object will exert an equal and opposite force on the first.

Opposite charges attract one another:
This means that when a negatively charged particle is in proximity to a positively charged particle, a mutual attractive force will develop. The first will exert a force on the second, and according to Newton's Third Law, the second will exert an equal and opposite force on the first.

Principles of Gravitational Force:
1. All electrical charges attract or repel one another: charges repel, while opposite charges attract.
2. The force between charged objects is directly proportional to the amount of electrical charge on each object.
3. The force between charged objects is directly proportional to the square of the distance between the two objects.

These two photos show the positive and negative attractions that I have posted about!