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GATE EE 2018 EXAM:Electrical Machines Quiz 8
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Question 1
Which one among the following has the highest numerical value in a stepper motor?
Question 2
A capacitor-start single-phase induction motor is used for:
Question 3
For a linear electromagnetic circuit, the following statement is true.
Question 4
A single phase induction motor is running at N rpm. Its synchronous speed is Ns. If its slip with respect to forward field is s, what is the slip with respect to the backward field?
Question 5
A 220V, 50 Hz, single-phase induction motor has the following connection diagram and winding orientations shown. MM’ is the axis of the main stator winding (M1M2) and AA’ is that of the auxiliary winding (A1A2). Directions of the winding axes indicate direction of flux when currents in the windings are in the directions shown. Parameters of each winding are indicated. When switch S is closed, the motor
Question 6
A single phase induction motor is provided with capacitor and centrifugal switch in series with auxiliary winding. The switch is expected to operate at a speed of 0.7 Ns, but due to malfunctioning the switch fails to operate. The torque-speed characteristic of the motor is represented by
Question 7
For a 1.8o, 2-phase bipolar stepper motor, the stepping rate is 100 steps/second. The rotational speed of the motor in rpm is
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Sep 8ESE & GATE EE
