Circuit breakers and fuses protect electrical wires, devices, appliances, luminaires, etc in different parts of your house. One circuit breaker or fuse may protect the kitchen electrical appliances while another circuit breaker or fuse may protect the electrical in the bathroom.
Think of your main panel as a tree; The roots are the service entrance conductors or wires coming from your utility company to the main panel. The tree trunk is the main panels hot buss bars, and the tree branches are your branch circuits (which includes breakers, wires from the breakers to the receptacles and any utilization equipment plugged into them). We know there are a lot of branches on trees and the same goes for your main panel.
Sure
Most electrical boxes have a number of breakers in them , so the whole house doesn't lose power when a fuse gets blown, from a short.
Unplug whatever it was which you were using at the time you blew the power.
Find the electrical box, one switch will be thrown. Flip it back.
this is meant to be a uk site ..can it happen in uk ? no ..we use ring mains ..lighting and sockets seperate circuits ..all lights connected ..as sockets ..except cooker ..some circuits are seperate for ground and first floor but its unusual
