1
GATE EE 2013
MCQ (Single Correct Answer)
+1
-0.3
A single-phase transformer has no-load loss of 64 W, as obtained from an open circuit test. When a short-circuit test is performed on it with 90% of the rated currents flowing in its both LV and HV windings, he measured loss is 81 W. The transformer has maximum efficiency when operated at
A
50.0% of the rated current.
B
64.0% of the rated current.
C
80.0% of the rated current.
D
88.8% of the rated current.
2
GATE EE 2011
MCQ (Single Correct Answer)
+1
-0.3
A single phase air core transformer, fed from a rated sinusoidal supply, is operating at no load. The steady state magnetizing current drawn by the transformer from the supply will have the waveform
A
GATE EE 2011 Electrical Machines - Transformers Question 81 English Option 1
B
GATE EE 2011 Electrical Machines - Transformers Question 81 English Option 2
C
GATE EE 2011 Electrical Machines - Transformers Question 81 English Option 3
D
GATE EE 2011 Electrical Machines - Transformers Question 81 English Option 4
3
GATE EE 2010
MCQ (Single Correct Answer)
+1
-0.3
A single-phase transformer has a turns ratio of 1:2, and is connected to a purely resistive load as shown in the figure. The magnetizing current drawn is 1 A, and the secondary current is 1 A. If core losses and leakage reactances are neglected, the primary current is GATE EE 2010 Electrical Machines - Transformers Question 82 English
A
1.41 A
B
2 A
C
2.24 A
D
3 A
4
GATE EE 2009
MCQ (Single Correct Answer)
+1
-0.3
The single phase, $$50$$ $$Hz$$ iron core transformer in the circuit has both the vertical arms of cross sectional area $$20\,\,c{m^2}$$ and both the horizontal arms of cross sectional area $$10\,\,c{m^2}$$. If the two windings shown were wound instead on opposite horizontal arms, the mutual inductances will GATE EE 2009 Electrical Machines - Transformers Question 28 English
A
double
B
remain same
C
be halved
D
become one quarter
GATE EE Subjects
EXAM MAP
Medical
NEET
Graduate Aptitude Test in Engineering
GATE CSEGATE ECEGATE EEGATE MEGATE CEGATE PIGATE IN
Civil Services
UPSC Civil Service
CBSE
Class 12