1
GATE EE 2012
MCQ (Single Correct Answer)
+1
-0.3
The slip of an induction motor normally does not depend on
A
rotor speed
B
synchronous speed
C
shaft torque
D
core-loss component
2
GATE EE 2010
MCQ (Single Correct Answer)
+1
-0.3
A balanced three-phase voltage is applied to a star-connected induction motor, the phase to neutral voltage being V. The stator resistance, rotor resistance referred to the stator, stator leakage reactance, rotor leakage reactance referred to the stator, and the magnetizing reactance are denoted by $$r_s,\;r_r,\;r_s,\;r_r\;and\;X_m$$, respectively. The magnitude of the starting current of the motor is given by
A
$$\frac V{\sqrt{\left(r_s+r_r\right)^2+\left(x_s+x_r\right)^2}}$$
B
$$\frac V{\sqrt{r_s^2+\left(r_s+X_m\right)^2}}$$
C
$$\frac V{\sqrt{\left(r_s+r_r\right)^2+\left(X_m+x_r\right)^2}}$$
D
$$\frac V{\sqrt{r_s^2+\left(X_m+x_r\right)^2}}$$
3
GATE EE 2005
MCQ (Single Correct Answer)
+1
-0.3
For an induction motor, operating at a slip 's', the ratio of gross power output to air gap power is equal to:
A
$$\left(1-s\right)^2$$
B
$$\left(1-s\right)$$
C
$$\sqrt{\left(1-s\right)}$$
D
$$\left(1-\sqrt s\right)$$
4
GATE EE 2005
MCQ (Single Correct Answer)
+1
-0.3
On the torque/speed curve of induction motor shown in Fig, four points of operation are market as W, X, Y and Z. Which one of them represents the operation at a slip greater than 1? GATE EE 2005 Electrical Machines - Induction Machines Question 63 English
A
W
B
X
C
Y
D
Z
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