How can you tell when a fuse is popped?

You can tell when a fuse is popped by checking for visible signs such as a broken wire or a darkened filament inside the glass casing. Additionally, if electrical devices or circuits connected to the fuse are not functioning, that may indicate a blown fuse. It's important to turn off the power and safely remove the fuse for inspection. If it appears damaged or if the metal strip inside is melted, it confirms that the fuse has blown.