Ph.D

Hi,
After completing electronics, engineers may find employment in electricity boards, atomic power plants, hydroelectric power plants, thermal power plants robotics, biomedical electronics, power corporations, hydro-electricity sector, production plants, natural gas plants, petroleum, steel and chemical plants.
Yes, now many universities and institutes are preferring Ph.D holder for job
Also there is huge demand for research professional in the country.
In regards to your question, whether there is any difference in Correspondence and Regular course, I would say it varies from one subject to the other also from one degree to the other. However in general a course through distance learning does not have as much value as the regular one so if you can do a regular course, it would hold a lot of importance and thus be a much better option.
The acceptability and recognition of a full time course is higher in industry and the long term career gains are good. Correspondence courses are ideally meant for those who are working and cannot leave their jobs to further their education. It is only to leverage ones experience and not so much as a standalone degree.
The employ-ability of a full time degree holder is the most and those with a distance education degree may face a drawback as far as employment options with MNCs are concerned. However, what is also relevant is your experience; skills and profile should match the profile needed for the job and organization. Thus it would be best for you to pursue a full time course.
I hope this information helps. Please feel free to revert.
Wish you luck.