1
GATE EE 2025
MCQ (Single Correct Answer)
+1
-0.33

The operating region of the developed torque ( $T_{\mathrm{em}}$ ) and speed ( $\omega$ ) of an induction motor drive is given by the shaded region OQRE in the figure. The load torque $\left(T_L\right)$ characteristic is also shown. The motor drive moves from the initial operating point O to the final operating point S . Which one of the following trajectories will take the shortes time?

GATE EE 2025 Electrical Machines - Induction Machines Question 2 English
A
$O-Q-R-S$
B
$\mathrm{O}-\mathrm{P}-\mathrm{S}$
C
$O-E-S$
D
$\mathrm{O}-\mathrm{F}-\mathrm{S}$
2
GATE EE 2024
MCQ (Single Correct Answer)
+1
-0.33

A three phase, 50 Hz, 6 pole induction motor runs at 960 rpm. The stator copper loss, core loss, and the rotational loss of the motor can be neglected. The percentage efficiency of the motor is

A

92

B

94

C

96

D

98

3
GATE EE 2023
MCQ (Single Correct Answer)
+1
-0.33

A 10-pole, 50 Hz, 240 V, single phase induction motor runs at 540 RPM while driving rated load. The frequency of induced rotor currents due to backward field is

A
100 Hz
B
95 Hz
C
10 Hz
D
5 Hz
4
GATE EE 2022
Numerical
+1
-0

The frequencies of the stator and rotor currents flowing in the three-phase 8-pole induction motor are 40 Hz and 1 Hz, respectively. The motor speed, in rpm, is ________. (round off to nearest integer).

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