There are two main types of electrical circuits:
1. **Series Circuit**: In a series circuit, all components (like resistors, light bulbs, etc.) are connected end-to-end in a single path. The current flows through each component one after another. If one component fails (like a bulb burning out), the entire circuit stops working because the current can't complete the path.
2. **Parallel Circuit**: In a parallel circuit, the components are connected in separate branches. Each component gets its own direct path to the power source. If one component fails, the others continue to work because the current can still flow through the other branches.
### Key Differences:
- **Series Circuit**: One path for current, if one component fails, the whole circuit stops.
- **Parallel Circuit**: Multiple paths for current, if one component fails, the others keep working.
Both types of circuits are used in different applications depending on the needs of the system!