Given below are two statements: 
Assertion (A): The use of ball bearings between two moving parts of a machine is a common practice.
Reason (R): Ball bearings reduce vibrations and provide good stability.
 
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. Both (A) and (R) are false.

 

Subtopic:  Friction |
From NCERT
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Given below are two statements: 
Assertion (A): A man in a closed cabin, which is falling freely, does not experience gravity.
Reason (R): Inertial and gravitational mass have equivalence.
 
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. Both (A) and (R) are false.
Subtopic:  Application of Laws |
From NCERT
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Given below are two statements: 
Assertion (A): The principle of rocket propulsion is a special case of a variable mass system.
Reason (R): The principle of rocket propulsion can be explained by Newton's second law.
  
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. Both (A) and (R) are false.

 
Subtopic:  Application of Laws |
 54%
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Given below are two statements: 
Assertion (A): It is difficult to move a bicycle along a road with its brakes on.
Reason (R): When a bicycle moves with its brakes on, it skids and sliding friction is greater than rolling friction.
 
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. Both (A) and (R) are false.
Subtopic:  Friction |
 82%
From NCERT
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Given below are two statements: 
Assertion (A): Banking of roads provides the necessary centripetal force.
Reason (R): One part of the normal reaction of the automobile gives necessary centripetal force.
 
1. Both (A) and (R) are True and (R) is the correct explanation of (A).
2. Both (A) and (R) are True but (R) is not the correct explanation of (A).
3. (A) is True but (R) is False.
4. Both (A) and (R) are False.



 
Subtopic:  Banking of Roads |
 74%
From NCERT
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Given below are two statements: 
Assertion (A): The apparent weight of the car is more when it crosses a concave bridge rather than a convex bridge with the same velocity.
Reason (R): The apparent weight of the car means the normal reaction and not the actual weight of the car.
 
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. Both (A) and (R) are false.
Subtopic:  Non Uniform Vertical Circular Motion |
 52%
From NCERT
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Given below are two statements: 
Assertion (A): The driver in a vehicle moving at a constant speed on a straight road is in a non-inertial frame of reference.
Reason (R): A reference frame in which Newton's law of motion is applicable is non-inertial.
 
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. Both (A) and (R) are false.

 
Subtopic:  Application of Laws |
 56%
From NCERT
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Given below are two statements: 
Assertion (A): A cyclist leans inwards while taking a turn, while a man sitting in a car leans outward on a curve.
Reason (R): Centripetal acceleration is acting towards the centre of the curve.
  
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. Both (A) and (R) are false.
Subtopic:  Banking of Roads |
 55%
From NCERT
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Given below are two statements: 
Assertion (A): On a rainy day, it is difficult to drive a car or a bus at a high speed.
Reason (R): The value of the coefficient of friction is lowered when the surface is wetted.
 
1. Both (A) and (R) are True and (R) is the correct explanation of (A).
2. Both (A) and (R) are True but (R) is not the correct explanation of (A).
3. (A) is True but (R) is False.
4. Both (A) and (R) are False.
Subtopic:  Banking of Roads |
 88%
From NCERT
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Given below are two statements: 
Assertion (A): In a non-uniform circular motion, there are two types of accelerations i.e. centripetal and tangential.
Reason (R): Tangential acceleration is responsible to change the speed of the particle moving in a circular motion.
  
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. Both (A) and (R) are false.
Subtopic:  Non Uniform Vertical Circular Motion |
 68%
From NCERT
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NEET 2023 - Target Batch - Aryan Raj Singh
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NEET 2023 - Target Batch - Aryan Raj Singh