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A 10-hp, 230-V, 500-r/min shunt motor, having a full-load armature current of 37 A, is started with a four-point starter. The resistance of the armature circuit, including the interpole winding, is 0.39 , and the resistances of the steps in the starting resistor are 1.56, 0.78, and 0.39 ,in the order in which they are successively cut out. When the armature current has dropped to its rated value, the starting box is switched to the next point, thus eliminating a step at a time in the starting resistance. Neglecting field-current changes, armature reaction, and armature inductance, find the initial and final values of the armature current and speed corresponding to each step.
what is tunneling effect ? With calculation.
What is the use of 8251 chip? 8251 chip is mostly used as the asynchronous serial interface among the processor and the external equipment.
Q. Show Process of Power transmission and distribution? The structure of a power system can be divided into generation (G), transmission, (T), and distribution (D) facilities,
Q. What is a darlington pair? The Darlington circuit consists of two cascaded emitter followers with infinite emitter resistance in the first stage.
Power Distribution You will study about the legislative measures that have been taken by our government to address these challenges. In particular, we discuss the Energy Conse
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National tariff policy: The Central Government notified the National Tariff Policy on January 6, 2006, for the power sector in line along with the Section 3 of the EA, 2003. Wi
What is the function of mode set register in 8257? The mode set register is used for programming the 8257 as per the needs of the system. The function of the mode set register
Balanced Score Card or BSC We see in which the traditional model does not reflect the significance of intangible assets, their capturing and measuring mechanism and does not r
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