Last Updated on April 24, 2025 by XAM CONTENT
Hello students, we are providing assertion reason questions for class 11. Assertion Reason questions are the new question format that is introduced in CBSE board. The resources for assertion reason questions are very less. So, to help students we have created chapterwise assertion reason questions for class 11 Physics. In this article, you will find assertion reason questions for CBSE Class 11 Physics Chapter 5 Work, Energy, and Power. It is a part of Assertion Reason Questions for CBSE Class 11 Physics Series.
| Chapter | Work, Energy, and Power |
| Type of Questions | Assertion Reason Questions |
| Nature of Questions | Competency Based Questions |
| Board | CBSE |
| Class | 11 |
| Subject | Physics |
| Useful for | Class 11 Studying Students |
| Answers provided | Yes |
| Difficulty level | Mentioned |
| Important Link | Class 11 Physics Chapterwise Assertion Reason |
Assertion Reason Questions on Work, Energy, and Power
Assertion Reason Questions
Directions:
Each of the following questions consists of two statements: an Assertion (A) and a Reason (R). Answer them by selecting the correct option:
(a) Both Assertion (A) and Reason (R) are true, and Reason (R) is the correct explanation of Assertion (A).
(b) Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of Assertion (A).
(c) Assertion (A) is true, but Reason (R) is false.
(d) Assertion (A) is false, but Reason (R) is true.
Q1. Assertion (A): When a body falls freely under gravity, mechanical energy is conserved.
Reason (R): The loss in potential energy equals the gain in kinetic energy.
Answer: (a) Both A and R are true, and R is the correct explanation of A.
Difficulty Level: Moderate
Q2. Assertion (A): Work done by centripetal force on a particle in uniform circular motion is zero.
Reason (R): Work done is zero if force is perpendicular to displacement.
Answer: (a) Both A and R are true, and R is the correct explanation of A.
Difficulty Level: Moderate
Q3. Assertion (A): A spring has minimum potential energy when it is compressed.
Reason (R): Potential energy stored in a spring is $U=\frac{1}{2} k x^2$.
Answer: (c) Assertion is false, but Reason is true.
Difficulty Level: Moderate
Q4. Assertion (A): Power is a scalar quantity, but momentum is a vector quantity.
Reason (R): Power is the rate of doing work and has only magnitude.
Answer: (a) Both A and R are true, and R is the correct explanation of A.
Difficulty Level: Tough
Q5. Assertion (A): The work-energy theorem is not valid for variable forces.
Reason (R): The work done by variable force is given by the area under the F–x graph.
Answer: (b) Both A and R are true, but R is not the correct explanation of A.
Difficulty Level: Tough
Also check
- Waves Class 11 Assertion Reason Questions Physics Chapter 14
- Oscillations Class 11 Assertion Reason Questions Physics Chapter 13
- Kinetic Theory Class 11 Assertion Reason Questions Physics Chapter 12
- Thermodynamics Class 11 Assertion Reason Questions Physics Chapter 11
- Thermal Properties of Matter Class 11 Assertion Reason Questions Physics Chapter 10
- Mechanical Properties of Fluids Class 11 Assertion Reason Questions Physics Chapter 9
- Mechanical Properties of Solids Class 11 Assertion Reason Questions Physics Chapter 8
- Gravitation Class 11 Assertion Reason Questions Physics Chapter 7
- System of Particles and Rotational Motion Class 11 Assertion Reason Questions Physics Chapter 6
- Work, Energy, and Power Class 11 Assertion Reason Questions Physics Chapter 5
- Laws of Motion Class 11 Assertion Reason Questions Physics Chapter 4
- Motion in a Plane Class 11 Assertion Reason Questions Physics Chapter 3
- Motion in a Straight Line Class 11 Assertion Reason Questions Physics Chapter 3
- Units and Measurements Class 11 Assertion Reason Questions Physics Chapter 2
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👉 Explore more resources on CBSE Class 11
Topics from which assertion reason questions may be asked
- Work done by a force
- Kinetic and potential energy
- Law of conservation of energy
Kinetic energy is proportional to the square of velocity — doubling speed quadruples energy.
Assertion reason questions from the above given topic may be asked.
Frequently Asked Questions (FAQs) on Work, Energy, and Power Assertion Reason Questions Class 11
Q1: What is the importance of Work, Energy, and Power in Class 11 Physics?
A1: It forms the basis for various real-life applications and is crucial for JEE/NEET level conceptual clarity.
Q2: Are assertion reason questions asked in CBSE exams?
A2: Yes, CBSE has introduced competency-based formats which include assertion reason questions to test conceptual understanding.
Q3: How to prepare assertion reason questions from Work, Energy, and Power?
A3: Focus on key definitions, cause-effect relationships, and conceptual reasoning instead of just memorizing facts.
Q4: Can numerical topics appear in assertion reason format?
A4: Yes, concepts from numerical topics like laws, formulas, or effects of parameter change are often asked.
Q5: Where can I find more assertion reason questions on Work, Energy, and Power?
A5: Visit xamcontent.com and physicsgurukul.com for chapterwise assertion reason question collections.
