1
GATE EE 2002
MCQ (Single Correct Answer)
+1
-0.3
A 1 kVA, 230V/100V, single phase, 50 Hz transformer having negligible winding resistance and leakage inductance is operating under saturation, while 250 V, 50 Hz sinusoidal supply is connected to the high voltage winding. A resistive load is connected to the low voltage winding which draws rated current. Which one of the following quantities will not be sinusoidal?
A
Voltage induced across the low voltage winding
B
Core flux
C
Load current
D
Current drawn from the source
2
GATE EE 2001
MCQ (Single Correct Answer)
+1
-0.3
A single-phase transformer is to be switched to the supply to have minimum inrush current. The switch should be closed at
A
maximum supply voltage
B
zero supply voltage
C
$$\frac1{\sqrt2}$$ maximum supply voltage
D
$$\frac12$$ maximum supply voltage
3
GATE EE 2001
MCQ (Single Correct Answer)
+1
-0.3
The core flux of a practical transformer with a resistive load
A
is strictly constant with load changes
B
increases linearly with load
C
increases as the square root of the load
D
decreases with increased load
4
GATE EE 2000
MCQ (Single Correct Answer)
+1
-0.3
In a constant voltage transformer (CVT), the output voltage remains constant due to
A
capacitor
B
input inductor
C
saturation
D
tapped windings
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