1
GATE EE 1994
MCQ (Single Correct Answer)
+1
-0.3
A lissajous pattern, as shown in figure below, is observed on the screen of a $$CRO$$ when voltages of frequencies $${f_x}$$ and $${f_y}$$ are applied to the $$x$$ and $$y$$ plates respectively. $${f_x}:{f_y}$$ is then equal to GATE EE 1994 Electrical and Electronics Measurement - Cathode Ray Oscilloscope Question 17 English
A
$$3:2$$
B
$$1:2$$
C
$$2:3$$
D
$$2:1$$
2
GATE EE 1994
MCQ (Single Correct Answer)
+1
-0.3
Skew is used in induction motors in order to reduce torque due to
A
time harmonics
B
space harmonics
C
slot harmonics
D
reverse rotating fields
3
GATE EE 1994
MCQ (Single Correct Answer)
+1
-0.3
When a transformers winding suffers a short-circuit, the adjoining turns of the same winding experience
A
an attractive force
B
a repulsive force
C
no force
D
none of the above
4
GATE EE 1994
MCQ (Single Correct Answer)
+1
-0.3
Two transformers of identical voltage but of different capacities are operating in parallel. For satisfactory load sharing
A
impedances must be equal
B
per-unit impedances must be equal
C
per-unit impedances and $${X \over R}$$ ratios must be equal
D
impedances and $${X \over R}$$ ratios must be equal
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