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Questions


A 5 kVA, 50 V/100 V, single-phase transformer has a secondary terminal voltage of 95 V when loaded. The regulation of the transformer is (A) 4.5% (B) 9% (C) 5% (D) 1%
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A single-phase 100 kVA, 1000 V / 100 V, 50 Hz transformer has a voltage drop of 5% across its series impedance at full load. Of this, 3% is due to resistance. The percentage regulation of the transformer at full load with 0.8 lagging power factor is
1 Answer

A single-phase transformer of rating 25 kVA, supplies a 12 kW load at power factor of 0.6 lagging. The additional load at unity power factor in kW (round off to two decimal places) that may be added before this transformer exceeds its rated kVA is __________.
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Which one of the following transforms relates the real and imaginary components of harmonic electromagnetic (EM) field? (-Gate geology and geophysics 2014)
1 Answer

Euler Poles defined for plate motions on a spherical earth are -gate Geology & Geophysics 2017
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Transformer cores are laminated in order to
1 Answer

Write any two sources of energy loss in a transformer (Physics CBSE 2018)
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Describe briefly, the working and principle of a step-up transformer. (Physics CBSE 2018)
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Considering the transformer to be ideal, the transmission parameter A of the 2– port network shown in the figure below is GATE-Instrumentational-Engineering-2013
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Which one of the following is most stable for cores of transformer?
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In a full wave rectifier, the input is from 30-0-30 V transformer. The load and diode forward resistances are 100 Ω and 10 Ω respectively. Calculate the average voltage, DC output power, ac input power, rectification efficiency and p
1 Answer

A step-up transformer converts a low input voltage into a high output voltage. Does it violate the law of conservation of energy ? Justify your answer. (Physics CBSE 2018)
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In transformer, core is made of soft iron to reduce
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With a neat diagram explain the classic five stage pipe line for a RISC processor?
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In a transformer, 220 AC voltage is increased to 2200 V. If the number of turns in the secondary are 2000, then the number of turns in the primary will be
0 Answer

What is increased in a step-down transformer?
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Under alkaline conditions, DNA is more stable than RNA because, GATE-Biotechnology-2013
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A transformer has 1000 primary turns. It is connected to 250 volts A.C supply. Find the number of secondary turns to get secondary voltage of 400 volts
1 Answer

Which of the following options is the closes t in meaning to the word Primeval, GATE- Architecture and Planning- 2013
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Protein A, which has strong affinity to F c region of immunoglobulin, is extracted from, GATE-Biotechnology-2013
1 Answer
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