The ‘Golden Hour’ refers to a time period lasting from a few minutes to several hours following a traumatic injury during which there is the highest likelihood that prompt medical treatment will prevent death.

A coma is a prolonged state of unconsciousness. During a coma, a person is unresponsive to their environment. The person is alive and looks like they are sleeping. However, unlike in a deep sleep, the person cannot be awakened by any stimulation, including pain.

Purpose of switch in electrical circuit is to Start or stop the flow of current.

Neon circuit tester has no power by itself but uses a neon indicator light connected to a ballast resistor, and the light only glows when power is present. As the voltage increases, the neon test light glows brighter.