Physics-(general)
NEET Physics (general) Assertion Reason Question
Type: Assertion Reason-assertion-Easy-Class 12
Assertion (A): The mass of an object measured using a physical balance can be affected by friction between the knife-edge and the plate. | Reason (R): A physical balance should be kept dry and clean to minimize errors due to friction.
A
Both A and R are true, and R is the correct explanation of A.
B
Both A and R are true, but R is not the correct explanation of A.
C
A is true, but R is false.
D
A is false.
Correct Answer
Option A
Detailed Explanation
The NCERT context mentions that the correctness of mass determined by a physical balance depends on minimizing errors arising from friction between the knife-edge and plate. Keeping the balance dry and clean helps in this aspect.
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