IIT JAM (Joint Admission Test for M.Sc.) is a national-level entrance exam conducted by the Indian Institutes of Technology (IITs) for admission to various postgraduate programs in science and technology fields. If you are looking for sample papers or mock tests with the actual marking scheme used in the IIT JAM Physics exam, here is some information that might help you:

Sample Papers:
================
Sample papers are a great way to familiarize yourself with the pattern and difficulty level of the exam. They give you an idea of the types of questions that can be expected and help you practice and improve your problem-solving skills.

EduRev (www.edurev.in) is a reliable platform that provides a wide range of educational resources, including sample papers for the IIT JAM Physics exam. They have a collection of previous years' question papers and mock tests that you can access for free. These papers are accompanied by detailed solutions and answer keys, which can be helpful in understanding the marking scheme and evaluating your performance.

Mock Tests:
================
Mock tests simulate the actual exam environment and help you assess your preparation level. They give you a sense of the time management required and allow you to identify your strengths and weaknesses. Taking multiple mock tests can enhance your speed and accuracy in solving problems.

EduRev also offers mock tests for the IIT JAM Physics exam. These tests are designed by subject experts and are similar to the actual exam in terms of difficulty level and question types. They provide a comprehensive analysis of your performance, highlighting areas that need improvement. The marking scheme used in these mock tests follows the official guidelines of the exam, ensuring a realistic assessment of your scores.

Marking Scheme:
================
The marking scheme used in the IIT JAM Physics exam may vary from year to year, but generally, it follows a pattern of positive and negative marking. Here are the key points of the marking scheme:

- Each question carries a certain number of marks, which can vary.
- For every correct answer, you are awarded full marks (usually 1 or 2 marks).
- For every incorrect answer, there is negative marking. The deduction of marks can vary but is typically 1/3 or 1/2 of the allotted marks for the question.
- There may be some questions with no negative marking, indicated explicitly in the question paper.
- Unanswered or unattempted questions usually do not attract any marks or penalties.

It is important to understand the marking scheme thoroughly before attempting the exam. Practicing with sample papers and mock tests that follow the same marking scheme will help you get accustomed to it and devise a strategy to maximize your scores while minimizing the negative marking.

In conclusion, EduRev is a reliable platform that provides sample papers and mock tests for the IIT JAM Physics exam. These resources can be accessed for free and help you understand the marking scheme, practice effectively, and improve your chances of success in the exam.