A repelling force occurs between two charged objects when they have the same type of charge.

Here's why:

* Like charges repel: Objects with the same charge, whether both positive (+) or both negative (-), experience a repulsive force pushing them apart.

* Opposite charges attract: Objects with opposite charges (one positive and one negative) experience an attractive force pulling them together.

This principle is fundamental to electromagnetism and is responsible for many phenomena, from the behavior of atoms to the operation of electric motors.