Every Mechanical Engineering student requires high-speed, smooth, and multipurpose laptops to tackle the complications in the course. Your laptop should be efficient enough to do high-speed work and fulfill all requirements since a major part of your study is based on PDFs and online assignments. You require systems that can handle heavy project loads in programs designed for 3D environments and video rendering.

• Processor: Applications required are basically CPU exhaustive. They have to load huge databases to set up the workstation, and a light processor will make you wait a lot. More precisely, the best choice is i5-6300HQ/i7-6500U. If you are looking for a high-end CPU, go for 7-6700HQ or even i7-6820HK.
• RAM: A high-end processor is useless unless the memory is not sufficient. A high RAM is needed to perform everyday tasks, and if your memory is low, your processor won’t perform as well as it could. A minimum of 8 GB RAM is recommended and the most ideal is 16 GB.
• GPU: Operating heavy programs require excellent speed and resolution. Especially programs like MATLAB and CAD are used for 3D environments and video rendering, and a normal laptop will not be sufficient. Thus you should be choosing from Nvidia GTX 960M, 1050, and 1050 ti. 
• Storage: The ideal storage I would recommend should be around 1Tb hdd. SSD is another option but not budget-friendly. 

While one can compromise on storage, a Mechanical Engineer’s laptop is expected to have excellent memory, CPU, and graphics that will run heavy programs smoothly.

Firstly, it’s important to note that IIT Kharagpur does not offer a bachelor's course in Economics, but rather an integrated MSc course. Indeed, the scope of economics is increasing day by day owing to its high demand in the corporate sector.

After completing a Bachelor's degree in Economics from IIT Kharagpur, there are a variety of career opportunities available to you. Some popular choices include:

• Opting for higher education by pursuing a Master's or Ph.D. in Economics or a related field, such as Finance, Business, or Public Policy.
• Working in the financial sector, such as investment banking, private equity, or venture capital.
• Working in a government or international organization, such as the World Bank, the International Monetary Fund, or a national central bank.
• Joining a consulting firm, such as McKinsey, Boston Consulting Group, or Accenture.
• Working in academia, as a professor or researcher in Economics.
• Joining an NGO that focuses on economic development, poverty reduction, or environmental sustainability.

Additionally, Economic students tend to have a lot of free time and thus can utilize the same in pursuing a micro or minor course in other departments like CSE or Mathematics. This is helpful only if they are willing to get Finance and Analytics jobs. They can also prepare for exams like CFA which have numerous job prospects.

There is no fixed method that can guarantee a 9+ CGPA in IIT Kharagpur. But one can talk to their seniors or toppers and get a little insight into the methods adopted by them to ace exams. My sister recently graduated from IIT KGP with a 9.7 CGPA and shared the simple tips that helped her sail through the tough college years 

• Don’t miss lectures at all and make concise and precise notes on the same
• Do your assignments well before the deadline so that it does not affect your entire study schedule
• The key is consistency. Studying for short periods regularly is better than studying for long hours in the last few weeks before exams.
• Pay special attention to subjects with more than 10 credits and try to excel in them no matter what.
• Don’t take the lab sessions lightly and make your contributions in the same.

These simple pointers will help you a long way to secure an excellent CGPA.

You should have a plausible reason justifying your guide change during your Ph.D. at IIT Kharagpur. One such reason can be very slow progress or laid back attitude. There might be any other compatible issues as well that might hinder your progress in getting the required training for a Ph.D. degree.

Once you are certain that your reason is one that needs to be addressed, present your stance to your Head of the Department, who will call a meeting of your doctoral scrutiny committee (DSC). You will be asked to present the case in front of the DSC members and your guide who has to agree to release you from his guidance. Once you have been released, another faculty member of the same department should volunteer to take you under his umbrella.

Concludingly, there are 3 major requisites for Ph.D. guide change

• A concrete reason like no progress 
• The faculty guide should be ready to release you happily
• Another faculty guide should be ready to take you under his guidance.

These may look like simple steps but sometimes can be very difficult and challenging.