Headaches can lead to scalp pain and to pain in any area of the face, neck or head. Several types of headaches may cause scalp pain, such as migraine, sinus headache, tension headache, and those caused by nerve involvement such as occipital neuralgia.
The circuit breaker. The circuit breaker does the same job as the fuse, but works in a different way. A spring-loaded push switch is held in the closed position by a spring-loaded soft iron bolt. An electromagnet is arranged so that it can pull the bolt away from the switch.
There are 2 main types of standard breakers: 1  Single pole â These are single switches and likely make up most of the breakers in your breaker box. In the photo above, all the circuit breakers on the left side, except the service disconnect, are single pole. 2  Double pole â These look like two switches joined together.