Q81. A 3 ph, 6 pole 50 Hz induction motor is running at 950 r.p.m. and has rotor Cu-loss 5 kW. The rotor input is________kW.

Q82. When supply voltage of induction motor is reduced by 10%, the maximum torque will decrease by

Q83. The starting current of a 3-phase induction motor is about ................... of its full load rated current.

Q84. Crawling in an induction motor is caused by

Q85. A change of 4% in the supply voltage to an induction motor will produce a change of approximately

Q86. When supply voltage of an induction motor is reduced by 10%, the maximum torque will decrease by approximately

Q87. For satisfactory performance of a 3 – phase 480 V, 60 Hz induction motor the supply voltage at 50 Hz should be equal to

Q88. The medium size induction motor having maximum efficiency while operating at

Q89. When a capacitor is connected across a single phase motor, the active power drawn by the motor.

Q90. Capacitor start capacitor run induction motor is