1
GATE EE 1999
MCQ (Single Correct Answer)
+2
-0.6
The percentage resistance and percentage reactance of a 10 kVA, 400 V/200 V,
3-phase transformer are 2% and 10% respectively. If the constant losses in the
machine are 1%, the maximum possible percentage efficiency of the transformer
is:
2
GATE EE 1999
MCQ (Single Correct Answer)
+2
-0.6
A 400V/100V, 10 kVA two-winding transformer is reconnected as an autotransformer
across a suitable voltage source. The maximum rating of such an
arrangement could be
3
GATE EE 1999
MCQ (Single Correct Answer)
+2
-0.6
A 10 kVA, 400 V/200 V, single phase transformer with a percentage resistance
of 3% and percentage reactance of 6% is supplying a current of 50 A to a
resistive load. The value of the load voltage is:
4
GATE EE 1998
MCQ (Single Correct Answer)
+2
-0.6
A 50 Hz transformer having equal hysteresis and eddy current losses at rated
excitation is operated at 45 Hz at 90% of its rated voltage. Compared to rated
operating point, the core losses under this condition:
Questions Asked from Transformers (Marks 2)
Number in Brackets after Paper Indicates No. of Questions
GATE EE 2023 (1)
GATE EE 2018 (2)
GATE EE 2017 Set 2 (1)
GATE EE 2017 Set 1 (1)
GATE EE 2016 Set 2 (2)
GATE EE 2016 Set 1 (3)
GATE EE 2015 Set 1 (2)
GATE EE 2015 Set 2 (3)
GATE EE 2014 Set 2 (1)
GATE EE 2014 Set 3 (4)
GATE EE 2014 Set 1 (1)
GATE EE 2013 (1)
GATE EE 2012 (1)
GATE EE 2010 (1)
GATE EE 2009 (6)
GATE EE 2008 (2)
GATE EE 2007 (1)
GATE EE 2006 (3)
GATE EE 2004 (3)
GATE EE 2003 (3)
GATE EE 2002 (1)
GATE EE 2001 (2)
GATE EE 2000 (1)
GATE EE 1999 (5)
GATE EE 1998 (1)
GATE EE 1997 (2)
GATE EE 1993 (1)
GATE EE Subjects
Electric Circuits
Electromagnetic Fields
Signals and Systems
Electrical Machines
Engineering Mathematics
General Aptitude
Power System Analysis
Electrical and Electronics Measurement
Analog Electronics
Control Systems
Power Electronics