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Q. Three single-phase 100-kVA, 2400:240-V, 60-Hz transformers (each ofwhich has an equivalent series impedance of 0.045+j0.16 referred to its low-voltage side) are connected to form a three phase, 4160:240-V transformer bank, which in turn is connected to a three-phase feeder with an impedance of 0.5 + j1.5 /phase. When the three-phase transformer bank delivers 250 kWat 240Vand 0.866 lagging power factor, determine:
(a) The transformer winding currents.
(b) The sending-end voltage (line to line) at the source.
Q. Show that the block diagram of Figure can be reduced to the form of Figure. Find G eq (s) and H eq (s).
State the postulates of Bohr''s atomic model. Write any three merits and demerits.
It is needed to use a half-wave rectifier for a dc power supply that gives an average dc output voltage of 15 V and a maximum ±1V ripple is permitted. The rectifier feeds a load of
Q. A depletion MOSFET is given to have large V A , V P = 2.8V, I DSS = 4.3 mA, v DS = 4.5V,and v GS = 1.2V. (a) Is theMOSFEToperating in the active region? (b) Find iD.
Why do wenot see the battery and capacitor combination for power backup? Ans) There are "super capacitors" that are used for power backup - they are well-organized for short-te
Rise Time (t r ) During rise time voltage falls from 90% V a to 10% where V a where V a is the initial anode voltage. In terms of current time taken by anode curre
-micro controller AT89C51 -dc motor -magnetic sensors -load sensors -how to connect all the components? and give me a circuit diagrams -how to interface all the component with m
Data analysis in GIS: Therefore, GIS consists of the following: 1. Database - for storage and retrieval of information. The database forms the foundation of the GIS syst
ANA Logical AND with Accumulator Instruction This instruction is used to logically AND the accumulator of any register or memory location with the accumulator and the r
Question: A DC, separately excited motor is supplied from a 240-V source. When the motor is unloaded, it draws 1A of current from the source. When the motor is loaded, it draws
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