GATE Scores

Yes, you may get. You have a fair chances of getting a seat in IIT just wait for counseling procedure that is CCMT but I have doubt that whether this IIT offer this course in which you want to take the admission since many other IIT too offered this course but this IIT does't because last year also this IIT did not release the cutoff for power electronic. So I suggest you take just verify whether the course is available in the IIT or not. Also check other IIT like Delhi, Bombay this might offer seat in power electronic.

GATE exam is conduct for 100 marks only, how can you get 369.

You will not get any decent college. I would suggest you to drop a year if you can & again prepare for GATE.
All the best.

GATE qualified candidates can follow the following procedure to apply in IPU for M.Tech CSE:-
1.Apply by filling the application form first. The last date of filling the application form is May 1, 2018.
2. After having filled the application form, a merit list based on different scores will be issued by IPU. Keep yourself updated about the merit list by visiting http://www.ipu.ac.in/
3. Based on your gate score you will be called for counseling most probably in June/July.
Hope this helped :)

Yes, you are eligible for M.Tech in IIT, Kharagpur, I have checked the eligibility it says you have to score 60% in your graduation and the GATE score depends on the ranking. You can check more about it on the following link:-
https://www.shiksha.com/engineering/course/m-tech-in-solid-state-technology-indian-institute-of-technology-kharagpur-293981.

Placement wise, if you go for new NIT or IIT (new), there is very less scope. I think you take a 1 year break and improve your rank. Then, you can get easily any old IIT.

Top ranked NITs for M.Tech are mentioned below:
1. NIT Trichy.
2. NIT Surathkal.
3. NIT Warangal. Regards.

It depends on your GATE 2018 score. Kindly share your GATE score.