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Q. The efficiency of a 400-kVA, single-phase, 60-Hz transformer is 98.77% when delivering full-load current at 0.8 power factor, and 99.13%with half rated current at unity power factor. Calculate:
(a) The iron loss.
(b) The full-load copper loss.
(c) The efficiency at 3/4 load, 0.9 power factor
Define HRQ? The hold demand output requests the access of the system bus. In non- cascaded 8257 systems, this is linked with HOLD pin of CPU. In cascade mode, this pin of a sla
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Register Addressing In this mode the operand are microprocessors registers only i, e the operations is performed within various registers of the microprocessors only.
1) only one pair of slip rings are required (to energise the rotating field coil) regardless of the number of phases produced by the alternator (three phases is common because of t
Logically AND the contents of memory Contents of memory location, whose address is specified by HL register pair are logically AND with the contents of the accumulator. The
how double diffraction occur at the surface
Note transducers convert a physical quantity from one form to another. The case below illustrates a typical moving coil meter that converts a current into a mechanical a
Q. Two balanced, wye-connected, three-phase loads are in parallel across a balanced, three - phase 60- Hz, 208-Vsupply. The first load takes 12 kWat 0.6 power factor lagging, and t
State the features of Washing machines Microprocessor would be used to control the below features, for instance: - Water temperature - Time for every cycle - Wash cy
Q. How does one arrive at the probability of availability of free lines during busy hour? How can this be improved? Ans: One can arrive at probability of free lines during busy
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