Car ignition system Assignment Example | Topics and Well Written Essays - 1000 words

Car ignition system - Assignment Example The coil consists of an iron core that is laminated, surrounded by two copper coils. The iron core does not create a closed loop on the windings, forming a magnetic circuit that is open, unlike in the case of transformers. The energy stored in the core magnetic field is then transferred to the spark plug. The primary core winding turns are of heavy wire and are relatively few. The secondary core winding are of smaller wire and consists of several thousands of turns. The wires are insulated by enamel and oiled paper since they carry very high voltages. The coil is normally inserted in a plastic case or a metal can with insulated terminals. Two types of coils are used in Volkswagens; the Black coil and the blue coil (Vidler & Knowles, 2003). The table below shows the comparison of the two types of coils. High tension lead wires are used to connect an ignition coil, a distributor and magneto to the spark plugs. Each of the leads contain a single wire since the current does not come back through the same path, but through the grounded engine connected to the negative terminal of the battery. A spark plug lead should have a resistance range of between 14 to 16Kohm/meter (Bolton, 2005). When the ignition switch is closed, current from the battery builds up inside the primary winding of the coil. However, the inductance of the coil prevents instant flow of current. The flow of current inside the coil produces a magnetic field around the core. Current must be allowed to flow long enough in order to store sufficient energy for the spark. Once sufficient energy is built, the contact breaker is opened, and since it is connected to a capacitor, the capacitor and the primary winding form a tuned circuit. The oscillation of the stored energy between the capacitor and the inductor of the coil initiates changing of magnetic field in the core of the coiling

Frame by Frame - Music and Soundscapes Essay Example | Topics and Well Written Essays - 500 words

Frame by Frame - Music and Soundscapes - Essay Example There are a variety of transitions implemented in this scene. The beginning of the scene implements traditional continuity editing shots that narrate Nash’s encounter with the military officials. Within this continuity editing there are juxtapositions between the military officials and Nash’s sudden face. This continuity editing gives way to dissolves of Nash’s face, as well as dissolves of the specific numbers he is examining. Rather than functioning within regular continuity, these dissolves demonstrate the passage of time as Nash examines and ponders the flashing numbers. These transitions, as well as the traditional and non-traditional editing techniques, have a variety of effects on scene and viewer. Perhaps most prominently this approach creates a dream-like atmosphere. Rather than conveying the scenes in a direct narrative way, this dream-like explication allows the viewer to viscerally experience Nash’s creative process and the way he is able to so lve these equations. It’s noted that there are three different types of sound in film. Diegetic sound is sound that both the audience and the characters can hear (Stanley, 2011). This is contrasted with non-diegetic sound that occurs outside of the character’s comprehension, but is available to the audience (Stanley, 2011). Finally there is ambient or natural sound; while this is also recognized as non-diegetic it constitutes a more specific articulation of this sound notion ("Types of," 2011). In the ‘Barrels’ scene from Jaws one recognizes the implementation of non-diegetic sound as the film’s soundtrack immediately overlays the narrative events. Additionally, natural and ambient sound occurs with the sound of the ocean and the events on the ship. Finally, there is diegetic sound implemented through discussions on the radio. In the ‘Opposites Do Not Attract’ scene from When Harry Met Sally one recognizes the implementation of natural and ambient sound in the car