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 3 Motion in a Plane. It is a part of Assertion Reason Questions for CBSE Class 11 Physics Series.
| Chapter | Motion in a Plane |
| 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 Motion in a Plane
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 two vectors are perpendicular, their dot product is zero.
Reason (R): Dot product of vectors depends on the sine of the angle between them.
Answer: (c) Assertion is true, but Reason is false.
Difficulty Level: Moderate
Q2. Assertion (A): The horizontal range of a projectile is maximum when the angle of projection is $45^{\circ}$. Reason (R): Horizontal range $R=\frac{u^2 \sin 2 \theta}{g}$, and $\sin 2 \theta$ is maximum at $2 \theta=90^{\circ}$.
Answer: (a) Both $A$ and $R$ are true, and $R$ is the correct explanation of $A$.
Difficulty Level: Moderate
Q3. Assertion (A): In uniform circular motion, velocity is constant.
Reason (R): In uniform circular motion, only the direction of velocity changes continuously.
Answer: (d) Assertion is false, but Reason is true.
Difficulty Level: Moderate
Q4. Assertion (A): Acceleration in uniform circular motion is directed towards the center of the circle.
Reason (R): Centripetal acceleration $a=\frac{v^2}{r}$ always acts radially inwards.
Answer: (b) Both $A$ and $R$ are true, but $R$ is not the correct explanation of $A$.
Difficulty Level: Tough
Also check
- 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
Topics from which assertion reason questions may be asked
- Scalars and vectors
- Projectile motion
- Relative velocity in two dimensions
Projectile motion is a classic example of two-dimensional motion combining horizontal and vertical motions.
Assertion reason questions from the above given topic may be asked.
Frequently Asked Questions (FAQs) on Motion in a Plane Assertion Reason Questions Class 11
Q1: What is the importance of Motion in a Plane 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 Motion in a Plane?
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 Motion in a Plane?
A5: Visit xamcontent.com and physicsgurukul.com for chapterwise assertion reason question collections.
