![]() ![]() When trying to resist the flow of alternating or direct electric circuit a resistor can be used in order to perform that action, this piece of component is placed in the electric circuit, depending on the circuit and how it functions the location of where the resisters are placed will vary. This system is used in the case of an emergency, the user will turn it on whenever there is an emergency, as a result the public will be aware that that given vehicle is an emergency vehicle, this allows the public to respond with necessary action, in that given situation. This system is controlled by in system controls within the vehicle itself, which allow the user to have full control of the lights system, determine how and when the lights come on or go off, and even how the police light behave in terms of how they flash. Police lights are a significant aspect of many emergency vehicles, as its one of their most recognisable features, which informs the public that indeed the given vehicles is an emergency vehicle. Early 1990s the single beacon lights became less common as light bars where introduced, they became popular and replaced the single beacon light. In the 1940s authorities used single beacon lights, which was placed on top of their cars. Police light have been around for years, since then they have developed drastically, with technology moving forward so have aspects of police light and how they are made, developed and manufactured nowadays. Literature Review / Dissertation Chapters
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