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Q. A transformer has its maximum efficiency of 0.9800 when it delivers 15 kVA at unity power factor. During the day it is loaded as follows:
12 hours 2 kW at power factor 0.5
6 hours 12 kW at power factor 0.8
6 hours 18 kW at power factor 0.9
Determine the all-day efficiency.
What is the use of stepper motor? A stepper motor is a device used to get an accurate position control of rotating shafts. A stepper motor employs rotation of its shaft in term
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Q. (a) The concept of duality can be extended to nonelectric physical systems bymeans of analogs. For example, the mechanical system characteristics can be investigated by means
#question. passive probe .
3) The impedance for a 120 km, 230-kV line is given as j 0.9 ohm/km and j 0.6 ohm/km for self and mutual terms respectively; resistance is neglected. The mho characteristic for the
circuit diagram of 2 bit magnitude comparator
Q. Figure gives the frequency-response graphs for a 709 op amp. Choose compensating components for the circuit to have a gain of 100 and a frequency response of up to 100 kHz.
Q. Common control switching system? Common Control Switching System: A functional block diagram of a common control switching system is displayed in Figure. Control functions
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