Special Instructions and Guidelines for the IIT JAM Physics Marking Scheme:

1. Marking Scheme:
- The IIT JAM Physics paper consists of multiple-choice questions (MCQs), multiple-select questions (MSQs), and numerical answer type (NAT) questions.
- For MCQs, each question carries 1 or 2 marks, and there is negative marking of 1/3 or 2/3 marks for incorrect answers.
- For MSQs, each question carries 1 or 2 marks, and there is no negative marking for incorrect answers.
- For NAT questions, each question carries 1 or 2 marks, and there is no negative marking for incorrect answers.

2. Partial Marking:
- In the case of partially correct answers for MCQs and MSQs, partial marking is applicable.
- The marking scheme for partially correct answers is mentioned in the question paper.
- It is important to read the instructions carefully and understand the marking scheme before attempting the questions.

3. Negative Marking:
- Negative marking is applicable for MCQs only.
- If a candidate chooses the wrong answer, 1/3 or 2/3 marks will be deducted from the total score.
- It is advisable to attempt only those questions for which the candidate is reasonably sure of the correct answer to avoid unnecessary negative marking.

4. Syllabus Coverage:
- It is important to have a thorough understanding of the prescribed syllabus for the IIT JAM Physics exam.
- The marking scheme is designed to assess the candidate's knowledge and understanding of the topics mentioned in the syllabus.
- The questions may cover various sub-topics within each section of the syllabus, so it is essential to have a comprehensive preparation.

5. Time Management:
- The IIT JAM Physics paper has a time limit, and it is crucial to manage time effectively during the exam.
- Candidates should allocate sufficient time to each section based on the number of questions and marks allotted to them.
- It is advisable to attempt easier questions first and then move on to the more challenging ones to maximize the score.

6. Practice and Revision:
- Regular practice and revision of the concepts, formulas, and problem-solving techniques are essential to excel in the IIT JAM Physics exam.
- Solving previous year question papers and mock tests will help in understanding the exam pattern and familiarize with the marking scheme.
- It is recommended to analyze the mistakes made in practice tests and work on improving weak areas.

7. Examination Hall Etiquette:
- Candidates must follow the instructions given by the invigilators in the examination hall.
- It is important to maintain discipline, avoid any malpractice, and strictly adhere to the rules and regulations of the examination center.

Following these special instructions and guidelines for the IIT JAM Physics marking scheme will help candidates to approach the exam in a systematic and strategic manner, increasing their chances of scoring well.