Career

Hi Likesh,
I do not know the course you are interested in joining at FTII. For all the courses the written test is in specific area including General Knowledge and General Mental Ability, except for screen play where written test is on screen play writing.
You can get more details on:
http://www.ftiindia.com/newftii/admisson_exam_schedule.html
To clear the test, you should make yourself well versed in the history of indian cinema, music, literature and art, basics of photogaphy and cinematography, knowledge on recent events and developments in literature and cinema. You may get few questions like writing the sound track for a particular situation, writing a story from a picture, drawing a different view for a given picture, etc.
For the presentation, skills matter and your attitude and passion for the field. You may be asked to give a portfolio of your work at the time of Interview. Read as many articles and lots of literature. Read about important figures in the Art and Culture world in India, including famous people of the past.
Also, your general knowledge about current events is what they want to see. So, as much as you can practice and of course watch loads of movies, do.
I hope the answer could help you. Hit like or mark it as the best answer.
All the best!

In short : Three phase currents flowing within the stator create a rotating magnetic field which induces a current, and consequent magnetic field in the rotor. Rotor torque is developed as the rotor slips a little behind the rotating stator field. Unlike single phase motors, polyphase induction motors are self-starting.
More detail :
In a DC motor, supply is needed to be given for the stator winding as well as the rotor winding. But in an induction motor only the stator winding is fed with an AC supply.
Alternating flux is produced around the stator winding due to AC supply. This alternating flux revolves with synchronous speed. The revolving flux is called as "Rotating Magnetic Field" (RMF).
The relative speed between stator RMF and rotor conductors causes an induced emf in the rotor conductors, according to the Faraday's law of electromagnetic induction. The rotor conductors are short circuited, and hence rotor current is produced due to induced emf. That is why such motors are called as induction motors.
(This action is same as that occurs in transformers, hence induction motors can be called as rotating transformers.)
Now, induced current in rotor will also produce alternating flux around it. This rotor flux lags behind the stator flux. The direction of induced rotor current, according to Lenz's law, is such that it will tend to oppose the cause of its production.
As the cause of production of rotor current is the relative velocity between rotating stator flux and the rotor, the rotor will try to catch up with the stator RMF. Thus the rotor rotates in the same direction as that of stator flux to minimize the relative velocity. However, the rotor never succeeds in catching up the synchronous speed. This is the basic working principle of induction motor of either type, single phase of 3 phase.

I would suggest you to make your career in unconventional field as they are less saturated and have better job opportunities. Like You can go for a degree course in Travel & Tourism. Many universities offer BBA in Hospitality, Travel & Tourism, under this you will acquire a thorough knowledge and understanding of Marketing, Sales, Tour Planning, Tour Operation, Holiday Consulting and foreign exchange management for tourists. I would advise you to look for UTM, Shillong a university which is famous for its BBA Hospitality, Travel & Tourism program. Being a tourist destination(Shillong) itself, Students in UTM gets ample of experience in this industry and gets to know and in and outs too.