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  • Chapter 11: Communication & Navigation › Analog Electronics › Electron Control Valves

    Figure 11-20. The flow of current and the P-N junction of a semiconductor diode attached to a battery in a circuit. Semiconductor diodes are used often in electronic circuits. When AC current is applied to a semiconductor diode ... current flows during one cycle of the AC but not during the other cycle. The diode, therefore, becomes a rectifier. When it is forward biased, electrons flow; when the AC cycles, electrons do not flow. A simple AC rectifier circuit…

  • Chapter 9: Aircraft Electrical System › Current Limiting Devices › Circuit Breakers

    Circuit Breakers A circuit breaker is an automatically operated electrical switch designed to protect an electrical circuit from damage caused by an overload or short circuit. Its basic function is to detect a fault condition and immediately discontinue electrical flow ... Unlike a fuse that operates once and then has to be replaced, a circuit breaker can be reset to resume normal operation. All resettable circuit breakers should open the circuit in which they are installed regardless of the position…

  • Chapter 12: Fundamentals of Electricity & Electronics › Free Electrons

    However, an energy level does not need to be completely filled before electrons begin to fill the next level. The Periodic Table of Elements should be checked to determine an element’s electron configuration. Figure 12-1. A water molecule ... Valence Electrons Valence is the number of chemical bonds an atom can form. Valence electrons are electrons that can participate in chemical bonds with other atoms. The number of electrons in the outermost shell of the atom is the determining…

  • Chapter 11: Communication & Navigation › Fundamentals of Electronics › Analog Versus Digital Electronics

    Fundamentals of Electronics Analog Versus Digital Electronics Electronic devices represent and manipulate real-world phenomenon through the use of electrical signals. Electronic circuits are designed to perform a wide array of manipulations. Analog representations are continuous. Some aspect ... electric signal is modified proportionally to the real-world item that is being represented. For example, a microphone has electricity flowing through it that is altered when sound is applied. The type and strength of the modification to the electric…

  • Chapter 12: Fundamentals of Electricity & Electronics › General Composition of Matter › Electron Shells & Energy Levels

    Electron Shells & Energy Levels Electrons require a certain amount of energy to stay in an orbit. This particular quantity is called the electron’s energy level. By its motion alone, the electron possesses kinetic energy, while the electron’s position ... orbit determines its potential energy. The total energy of an electron is the main factor that determines the radius of the electron’s orbit. Electrons of an atom appear only at certain definite energy levels (shells). The spacing between energy…