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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
a mass of 20 kg is lifted u p to the roof of a cliff 100 m high.determie Ep of the mass while it is at the top
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Sir I would like to find a sensor that can detect beams from the phasor painfield generator and the sonic devasator (devices of this nature). These sonic devices emit a high pres
The circuit shown below is a DC charging and discharging circuit. a. At t = 0 sec, switch S1 is thrown to position 1 ("pos1"). Write the mathematical expressions for and .
Transformer of distribution: Let be the transformer of distribution of the Face(Figure) 3 connected to the primary between phase a and c of a three-phase network of 23 kV. Bot
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