Objective Questions on Working Principle of Three Phase Induction Motor

  1. The polyphase induction motors are, by a very considerable margin, the most widely used ac motors as

    Under construction.

  2. A smaller air gap in a polyphase induction motor helps to

    Under construction.

  3. In a three-phase induction motor

    Under construction.

  4. A three phase slip ring motor has

    Under construction.

  5. Skewing of the rotor in a three-phase squirrel cage induction motor reduces

    Under construction.

  6. The three-phase induction motor with rotor circuit open will

    Under construction.

  7. The principle of operation of a 3-phase induction motor is almost similar to that of

    Under construction.

  8. Two of supply terminals to a 3-phase induction motor get interchanged during re connection after normal maintenance. When switched on the supply, the motor will

    Under construction.

  9. The mmf produced by rotor currents of a 3-phase induction motor

    Under construction.

  10. At the instant of starting, the per unit slip of 3-phase induction motor is

    Under construction.

  11. The direction of rotation of a 3-phase induction motor can be reversed by

    Under construction.

  12. Stable operation of an induction motor

    Under construction.

  13. In a 3-phase induction motor, the maximum torque is

    Under construction.

  14. A 3-phase induction motor usually operates on

    Under construction.

  15. A three phase induction motor takes A amperes on full load at a power factor cosφ. The component responsible for producing magnetism is

    Under construction.

  16. A three phase induction motor connected to 2 phase supply

    Under construction.

  17. A 3-phase induction motor while running on 25 % of rated load, has one of its fuses removed. The line current

    Under construction.

  18. In an induction motor 5 % change in supply voltage, will cause rotor torque variation of

    Under construction.

  19. If single phase occurs in delta connected 3-phase induction motor

    Under construction.

  20. When a three phase induction motor is loaded

    Under construction.