HSC Physics Question Bank: Important Questions – Rotational Dynamics 2026
- Swarangi Nawge
- 9 hours ago
- 4 min read
For students preparing for the Maharashtra Board exams, the HSC Physics Question Bank is an indispensable resource. Rotational Dynamics, being the first chapter of the Class 12 Physics syllabus, carries a significant weightage of 5 to 7 marks. In 2026, the exam pattern continues to emphasize conceptual clarity, derivations, and application-based numericals.
This guide provides a comprehensive analysis of the most repeated and important questions from the Rotational Dynamics chapter, curated from official SCERT data and previous years' papers.
Understanding the Weightage for Rotational Dynamics 2026
Before diving into the questions, it is crucial to understand how this chapter is tested. Typically, the paper consists of:
Section A: MCQs and Very Short Answer (VSA) - 1 Mark each.
Section B: Short Answer I (SA-I) - 2 Marks each.
Section C: Short Answer II (SA-II) - 3 Marks each.
Section D: Long Answer (LA) - 4 Marks each (often a derivation with a numerical).
Important Questions for Rotational Dynamics 2026
Based on the latest HSC Physics Question Bank and trends analyzed from the 2018–2025 papers, here are the high-priority topics you must master:
1. Conceptual and Short Answer Questions (1-2 Marks)
Define Moment of Inertia and state its SI unit and dimensions.
Explain the physical significance of the Radius of Gyration.
Distinguish between Centripetal Force and Centrifugal Force.
Why does a dancer outstretch their arms during an ice ballet? (Based on the Principle of Conservation of Angular Momentum).
Define Banking of Roads and explain its necessity for safety.
2. Important Derivations (3-4 Marks)
Derivations are the backbone of this chapter. Ensure you can derive the following:
Expression for Torque: Relation between torque and angular acceleration.
Kinetic Energy of Rotation: Deriving the formula for a rigid body.
Angular Momentum: Relation between angular momentum and angular velocity.
Parallel and Perpendicular Axis Theorems: State and prove both theorems.
Conical Pendulum: Derive the expression for the periodic time of a conical pendulum.
Vertical Circular Motion: Expression for the difference in tension at the highest and lowest points.
3. Application-Based Numerical Topics
The HSC Physics Question Bank frequently includes numericals on:
Calculating the Moment of Inertia of a disc or sphere about different axes.
Finding the maximum safety speed of a vehicle on a banked road.
Conservation of angular momentum when a body’s mass distribution changes.
Total Kinetic Energy of a rolling body (Translational + Rotational).
High-Yield Formula Names to Remember
To solve problems quickly, memorize the following formula types (Calculations only):
Expression for Moment of Inertia of a uniform ring and disc.
Formula for Radius of Gyration.
Formula for Kinetic Energy of Rolling.
Equation for Angle of Banking.
Formula for Periodic Time of a Conical Pendulum.
Condition for Minimum Velocity at the top of a vertical circle.
Expert Preparation Tips for 2026
Focus on Diagrams: For 4-mark questions, a neat, labeled diagram (like the banked road or conical pendulum) can secure at least 1 full mark.
Step-wise Derivations: Boards award marks for every step. Even if you don't reach the final result, write the initial assumptions and equations.
Medical Entrance Alignment: For students also eyeing medical entrance exams, mastering Rotational Dynamics is vital as it forms a base for several high-weightage physics topics in NEET and FMGE 2026.
Official Practice: Always cross-reference your answers with the official SCERT "Prashnapedhi" to understand the expected terminology.
Official Resources & Links
To download the official papers and question banks, visit the authorities directly:
MSBSHSE Official Question Paper Section: Official Board Papers
SCERT Maharashtra (Question Bank Access): SCERT Prashnapedhi
Conclusion
The HSC Physics Question Bank is your roadmap to success in the 2026 board exams. By focusing on the repeated derivations and mastering the conceptual applications of Rotational Dynamics, you can easily secure full marks in this unit. Start your revision by practicing the diagrams first, then move to the derivations.
FAQ: HSC Physics Question Bank & Preparation
Q1: Where can I download the official HSC Physics Question Bank for 2026?
A: The official question bank, often referred to as "Prashnapedhi," is released by SCERT Maharashtra. You can access it through the official links provided in our CTA section below.
Q2: Is the HSC Physics Question Bank enough to score 90+?
A: While the question bank covers all important types, you should also solve at least 5 years of Previous Year Papers (PYQs) to understand the shifting difficulty levels and time management.
Q3: Which is the most repeated question in Rotational Dynamics?
A: The Parallel Axis Theorem and the expression for Banking of Roads are historically the most repeated 3-mark and 4-mark questions.
Q4: How many numericals can I expect from this chapter?
A: Usually, one 2-mark or 3-mark numerical is a certainty, often combined with a short derivation in Section D.
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