dodatni ładunek elektryczny

They are not positive and negative charges of any sort.

This means that if you put two positive charges close together and let them go, they would move apart.

All the matter in the world is made of tiny positive and negative charges.

They defined current to be in the direction of the positive charges.

It just depends on how you consider if current is negative or positive charges.

This leaves behind an area of positive charge, or hole.

It had passed a region of positive charge and remained in place.

Another went at the last to drain the round of its positive charge.

What was the source of the positive and negative charges?

Let us say that the charged object has a positive charge.