1
GATE EE 2015 Set 2
Numerical
+2
-0
Two three-phase transformers are realized using single-phase transformers as shown in the figure. GATE EE 2015 Set 2 Electrical Machines - Transformers Question 69 English The phase difference (in degree) between voltages V1 and V2 is _______.
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2
GATE EE 2015 Set 2
MCQ (Single Correct Answer)
+2
-0.6
A balanced (positive sequence) three-phase AC voltage source is connected to a balanced, star connected load through a star-delta transformer as shown in the figure. The line-to-line voltage rating is 230 V on the star side, and 115 V on the delta side. If the magnetizing current is neglected and $${\overline{\mathrm I}}_\mathrm s=100\angle0^\circ$$, then what is the value of $${\overline{\mathrm I}}_\mathrm p$$ in Ampere? GATE EE 2015 Set 2 Electrical Machines - Transformers Question 68 English
A
50$$\angle30^\circ$$
B
50$$\angle-30^\circ$$
C
50$$\sqrt3\angle30^\circ$$
D
200$$\angle30^\circ$$
3
GATE EE 2015 Set 2
MCQ (Single Correct Answer)
+2
-0.6
A three-winding transformer is connected to an AC voltage source as shown in the figure. The number of turns are as follows: N1=100, N2=50, N3=50. If the magnetizing current is neglected, and the currents in two windings are $${\overline I}_2=2\angle30^\circ$$ A and $${\overline I}_3=2\angle30^\circ$$ A, then what is the value of the current $${\overline I}_1$$ in Ampere? GATE EE 2015 Set 2 Electrical Machines - Transformers Question 66 English
A
$$1\angle90^\circ$$
B
$$1\angle270^\circ$$
C
$$4\angle90^\circ$$
D
$$4\angle270^\circ$$
4
GATE EE 2015 Set 2
Numerical
+1
-0
The figure shows the per-phase equivalent circuit of a two-pole three-phase induction motor operating at 50 Hz. The 'air-gap' voltage, Vg across the magnetizing inductance, is 210Vrms, and the slip, s, is 0.05. The torque (in Nm) produced by the motor is ________. GATE EE 2015 Set 2 Electrical Machines - Induction Machines Question 53 English
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