current carriers of diode? 10. Define diode. II. Testing Diode (5 pts each) 1. Write how to test Good Diode with your ohmmeter. 2. Write how to test Shorted Diode with your ohmmeter. 3. Write how to test Open Diode with your ohmmeter. 4. Write how to test Leaky Diode with your ohmmeter. III. Identification: Identify the following statement/question and write your answer on the space provided before each item. _____________ 1. This is the only type of diode that is used as oscillator
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semiconductor‚ but the junction between them can become depleted of charge carriers‚ and hence non-conductive‚ depending on the relative voltages of the two semiconductor regions. By manipulating this non-conductive layer‚ p–n junctions are commonly used as diodes: circuit elements that allow a flow of electricity in one direction but not in the other (opposite) direction. This property is explained in terms of forward bias and reverse bias‚ where the term bias refers to an application of electric voltage to
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5.13 Full wave regulated power supply +5v and +12v 22 5. Electronic components used 6.14 Resistors 25 6.15 Capacitors 27 6.16 Diodes 30 6.17 Zener diodes 33 6.18 Light emitting diodes 34 6.19 Relays 37 6.20 Transistors 40 6.21 Switches 42 6.22 Connectors and cables 43 7. Advantages 46 8. Applications
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further classified as Semiconductor Devices : Semiconductor diode‚ zener diode‚ and varactor diode etc. Uni-junction transistor‚ Bipolar junction transistor (BJT)‚ FET‚ silicon‚ Controlled rectifier etc. Vacuum Tube Devices : Vacuum tube diode‚ triode‚ Tetrode‚ Pentode‚ Hexode‚ Heptode etc. Gas Tube Devices : Gas diodes‚ Thyratons etc. Photo Sensitivity Devices : Gas photodiodes‚ photo multiplier tubes‚ photodiodes‚ light emitting diode‚ photosensitive transistor etc. Though there are devices
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saw . Later in 1897‚ this lamp straightening process was carried out and has been translated into alternating current into direct current . Further‚ radio waves separated detectors developed. In 1906‚ with the addition of a control element ‚ this diode triode lamp on lamp -worked and was thus opened the way to electronic science . Lamp made several circuits with many years ‚ especially in the Second World War as many different devices have been developed In 1948‚ with the invention of the transistor
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increasing or decreasing the number of level detector metal strips (L1 through L12) and their associated components. In the circuit‚ diodes D1‚ D2 and D13 form half-wave rectifiers. The rectified output is filtered using capacitors C1 through C3 respectively. Initially‚ when water level is below strip L1‚ the mains supply frequency oscillations are not transferred to diode D1. Thus its output is low and LED1 does not glow. Also‚ since base voltage of transister T1 is low‚ it is in cut-off state and its
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Elec221 Final Exam December 14‚ 2002 7. The slight slope of the collector current with increased collector voltage in the common-emitter characteristics of a BJT is called the ________early_____________ effect which is a result of ______________base width modulation_____________________. Short Questions (1 point for each blank) 8. The total capacitance of an ideal MOS structure includes the capacitance of ____SiO2_______ and the capacitance of _____depletion_region____________. 1. The
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EECE 352: 352 PN Junctions Peyman Servati y Outline • • • • Diffusion and drift currents Current continuity PN Junctions Diodes‚ photodetectors‚ solar cells Diffusion of Electrons Movement of electrons and holes (charge carriers) results in ( g ) conduction in materials. Electrons and holes in solids move based on Brownian motion (random walk). In this random movement‚ electrons effectively move from a movement location where the concentration is higher to where the concentration is
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How an SCR works?-Principle of Operation SCR Working Principle The SCR is a four-layer‚ three-junction and a three-terminal device and is shown in fig.a. The end P-region is the anode‚ the end N-region is the cathode and the inner P-region is the gate. The anode to cathode is connected in series with the load circuit. Essentially the device is a switch. Ideally it remains off (voltage blocking state)‚ or appears to have an infinite impedance until both the anode and gate terminals have suitable
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CHAPTER II THEORETICAL FRAMEWORK This Chapter presents the Relevant Theories‚ Related Literature and Studies‚ Conceptual Framework‚ Hypothesis and the Definition of Terms used in the study. Relevant Theories There are two theories which are considered relevant in this study‚ namely: Goal Setting Theory of Motiviation by Dr. Edwin Locke (1990)‚ and Cognitive Learning Theory. Goal Setting Theory states that goal setting is essentially linked to task performance. It states that specific
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