GATE-2016 EE (Electrical) 7th Feb Question Paper & Answer Key/Solution pdf

Q.43 The starting line current of a 415 V, 3-phase, delta connected induction motor is 120 A, when the rated voltage is applied to its stator winding. The starting line current at a reduced voltage of 110 V, in ampere, is _________.
Answer: 31.8

Q.44 A single-phase, 2 kVA, 100/200 V transformer is reconnected as an auto-transformer such that its kVA rating is maximum. The new rating, in kVA, is ______.
Answer: 6

Q.45 A full-bridge converter supplying an RLE load is shown in figure. The firing angle of the bridge converter is 120º. The supply voltage
R=20 Ω, E=800 V. The inductor L is large enough to make the output current IL a smooth dc current. Switches are losdless. The real power fed back to the source, in kW, is __________.

Answer: 6

Q.46 A three-phase Voltage Source Inverter (VSI) as shown in the figure is feeding a delta connected resistive load of 30 Ω/phase. If it is fed from a 600 V battery, with 180o conduction of solid-state devices, the power consumed by the load, in kW, is __________.


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