Charge conservation is a fundamental principle in physics stating that the total electric charge in an isolated system remains constant over time. This means that charge cannot be created or destroyed; it can only be transferred from one object to another. For example, when you rub a balloon on your hair, electrons move from your hair to the balloon, giving the balloon a negative charge while leaving your hair positively charged. This principle is crucial in understanding various phenomena in electricity and magnetism. It applies to all interactions involving charged particles, such as electrons and protons. In circuits, for instance, the total charge flowing into a junction equals the total charge flowing out, ensuring that charge is conserved throughout the system.