In an induction motor, no-load the slip is generally____________?
In an induction motor, no-load the slip is generally____________?
A. less than 1%
B. 1.5%
C. 2%
D. 4%
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Insertion of resistance in the stator of an induction motor___________?
Insertion of resistance in the stator of an induction motor___________?A. increases the load torque
B. decreases the starting torque
C. increases the starting torque
D. none of the aboveIn a star-delta starter of an induction motor___________?
In a star-delta starter of an induction motor___________?A. resistance is inserted in the stator
B. reduced voltage is applied to the stator
C. resistance is inserted in the rotor
D. applied voltage perl stator phase is 57.7% of the line voltageSlip ring motor is recommended where____________?
Slip ring motor is recommended where____________?A. speed control is required
B. frequent starting, stopg and reversing is required
C. high starting torque is needed
D. all above features are requiredBlocked rotor test on induction motors is used to find out?
Blocked rotor test on induction motors is used to find out?A. leakage reactance
B. power factor on short circuit
C. short-circuit current under rated voltage
D. all of the aboveThe rotor of an induction motor runs at__________?
The rotor of an induction motor runs at__________?A. synchronous speed
B. below synchronous speed
C. above synchronous speed
D. any of the aboveFor which motor the speed can be controlled from rotor side ?
For which motor the speed can be controlled from rotor side ?A. Squirrel-cage induction motor
B. Slip-ring induction motor
C. Both A. and (b)
D. None of the above