Marking Scheme for Multiple-Choice Questions in IIT JAM Physics Paper

1. Correct Answer:
- In the IIT JAM Physics paper, for multiple-choice questions, each question has four options, out of which only one option is correct.
- For every correct answer, candidates are awarded +1 mark.

2. Negative Marking:
- Negative marking is applicable for incorrect answers in multiple-choice questions.
- For every incorrect answer, 1/3 of the total marks allotted to that question are deducted.
- If a candidate marks more than one option for a single question, it is considered incorrect, and negative marking is applied.

3. Unattempted Questions:
- No marks are deducted for unattempted questions.
- If a candidate chooses not to answer a particular question, no marks will be awarded or deducted for that question.

4. Marking Scheme Example:
- Let's consider an example with a question having four options: A, B, C, and D.
- If the correct answer is option B, and a candidate selects option B, they will be awarded +1 mark.
- If the candidate selects any other option (A, C, or D), they will be penalized with -1/3 marks.
- If the candidate does not attempt the question, no marks will be awarded or deducted.

Marking Scheme for Descriptive Questions in IIT JAM Physics Paper

1. Detailed Solutions:
- Descriptive questions in the IIT JAM Physics paper require candidates to provide detailed solutions or explanations.
- The answers are not limited to a single word or sentence; candidates are expected to demonstrate their understanding of the concept and provide a comprehensive solution.

2. Stepwise Marking:
- Descriptive questions are evaluated based on the stepwise marking scheme.
- Candidates receive marks for each correct step or sub-answer provided in their solution.
- Partial marks may also be awarded for partially correct answers or steps.

3. Accuracy and Clarity:
- Accuracy and clarity in presenting the solution are crucial for scoring well in descriptive questions.
- Candidates should ensure that their solutions are clear, concise, and logically organized.
- Proper use of equations, formulas, and relevant concepts should be demonstrated.

4. Evaluation by Examiners:
- Evaluators carefully assess each candidate's solution to ensure correctness, relevance, and depth of understanding.
- The final marks awarded for descriptive questions are based on the overall quality and accuracy of the solution.

5. Marking Scheme Example:
- For a descriptive question with a maximum of 10 marks, a candidate may receive:
- 5 marks for providing the correct formula or equation,
- 2 marks for correctly substituting values,
- 2 marks for solving the equation correctly,
- 1 mark for providing the final answer with proper units.

Conclusion:
- The marking scheme for multiple-choice questions in the IIT JAM Physics paper involves +1 mark for a correct answer and -1/3 marks for an incorrect answer.
- Descriptive questions are evaluated based on a stepwise marking scheme, with marks awarded for each correct step or sub-answer.
- Clarity, accuracy, and depth of understanding are crucial for scoring well in descriptive questions.