mA controls- mA is the number of electrons crossing from cathode to anode (tube current). It is determined by the filament temperature. Filament temperature is controlled by the filament current. As the temperature increases‚ thermionic emission increases. The tube current is controlled by the filament circuit which the connection on the autotransformer provides voltage to the filament circuit. The mA selector is a resistor
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A UPQC has the same structure as a UPFC. It can inject current in shunt and voltage in series simultaneously in a dual control mode. Therefore it can perform both the functions of load compensation and voltage control at the same time. The UPQC must also inject unbalanced and distorted voltages and currents and hence its operating characteristics are than that of a UPFC. Furthermore their operation philosophy is different. The UPQC is also an (PQ) enhancement device. UPFC and can operate under
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1N4448 are high-speed switching diodes fabricated in planar technology‚ and encapsulated in hermetically sealed leaded glass SOD27 (DO-35) packages. BC548 This device is designed for use as general purpose amplifiers and switches requiring collector currents to 300 mA. DIMMING CIRCUIT Q4010LT TRIAC 10 A 400 V Isolated Bidirectional TRIAC - TO-220 DIODE 1N4006 This standard rectifier is designed for general purpose‚ low power applications. TECHNICAL REQUIREMENTS Block Diagram Description
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compensated for unity gain Large DC voltage gain 100 dB Wide bandwidth (unity gain) 1 MHz (temperature compensated) Wide power supply range: Single supply 3V to 32V or dual supplies ±1.5V to ±16V Very low supply current drain (700 μA)—essentially independent of supply voltage Low input biasing current 45 nA (temperature compensated) A relay is an electrically controllable switch widely used in industrial controls‚ automobiles and appliances. An electric motor uses electrical energy to produce
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designed for full-wave rectifier opertion. High output current and small size make this tube especially suitable for compact amplifier designs. ELECTRICAL Cathode .................................................................................................................. coated unipotential Heater Voltage AC or DC ....................................................................................... 5.0 ! 10% Volts Heater Current .......................................................
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2.1 Motors use the effect of forces on current-carrying conductors in magnetic fields 2.1.1 The motor effect The motor effect is where a force acts on a current-carrying conductor in a magnetic field. The right hand palm rule is used to find certain properties: fingers point to magnetic field‚ thumb points in DC direction and palm points to direction of the force. 2.1.2 Factors affecting the force acting on the current-carrying conductor Forces are experienced by the electrons in the conductor
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A.C. P7 Describe the properties and an application of two different magnetic materials commonly used in electrical and electronic engineering Task 1 By research and investigation; a) Identify and name two magnetic materials used in electrical engineering b) Give an application of each of the two materials c) Define two of the magnetic properties terms listed below: B-H curve*‚ retentivity (a.k.a. remanence)‚ coercivity (a.k.a. coercive force)‚ hysteresis‚ absolute permeability*‚ relative
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51. --------- extends the range of a moving-iron ac ammeter. C a. A shunt b. A multiplier c. Changing number of turns of operating coil d. A series 52. The most sensitive instrument is D a. Moving-iron b. Dynamometer c. Hot-wire d. Permanent-magnet moving coil BRIDGE MEASUREMENT 53. The bridge uses the -------- measurement and operates on ------------- principle. C a. Direct measurement and null indication b. indirect Direct measurement and null indication c. Comparison measurement and null
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Function = Questions: 1. If a power supply showed 30.00 on its display and to the right of it showed mV‚ what voltage do you think this would represent? 2. Use the fluke.com website to answer the following question. What is the current rating on the fuse in the Fluke 77-4? 3. What is the purpose of a fuse? Complete the following conversions‚ including appropriate engineering notation units: a. 10‚000 Hz = __________MHz b. 0.0001 MHz = __________Hz c. 1‚000
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in a house to get power supply such as a rice cooker‚ water heater and blender. This device will get supply from the life and neutral wire from kitchen home supply that are connected to the power module. It will convert 220V alternate current (AC) to 5V direct current (DC). Fig. 3.2 Main Control 3.2 Main Control The function of main control consists of gizduino together with its basic functional circuit which are located at electric switch‚ inside electric switch is the relay shown
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